445 lines
8.4 KiB
Plaintext
445 lines
8.4 KiB
Plaintext
{
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"cells": [
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{
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"cell_type": "markdown",
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"id": "2c522bc1",
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"metadata": {},
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"source": [
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"# Étape 2: Variables, affectation et type"
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]
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},
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{
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"cell_type": "markdown",
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"id": "7966e3c2",
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"metadata": {},
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"source": [
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"### Trois types de variables\n",
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"\n",
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"Pour nous (humain) les trois variables qui suivent sont itdentiques"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 1,
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"id": "d366babc",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"1"
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]
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},
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"execution_count": 1,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"a = 1\n",
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"a"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 2,
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"id": "87873ff4",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"1.0"
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]
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},
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"execution_count": 2,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"b = 1.0\n",
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"b"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"id": "98f34ab7",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"'1'"
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]
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},
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"execution_count": 3,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"c = \"1\"\n",
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"c"
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]
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},
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{
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"cell_type": "markdown",
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"id": "a1296b4f",
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"metadata": {},
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"source": [
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"Mais pour Python ce sont trois choses très différentes. Le premier est un **entier**, le deuxième est un **flottant** (nombre à virgule) et le dernier est une **chaine de caractères**."
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]
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},
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{
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"cell_type": "markdown",
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"id": "a65d6da0",
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"metadata": {},
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"source": [
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"1. Trier les variables suivantes en fonction de leur type"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 6,
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"id": "86571601",
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"metadata": {},
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"outputs": [],
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"source": [
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"a = 3\n",
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"b = 4.5\n",
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"c = \"coucou\"\n",
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"d = \"6\"\n",
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"e = 8\n",
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"f = 5.0\n",
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"g = \"09\"\n",
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"h = \"0.4\""
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]
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},
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{
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"cell_type": "raw",
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"id": "708fea37",
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"metadata": {},
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"source": [
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"Les entiers:\n",
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"Les flottants:\n",
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"Les chaines de caractères:"
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]
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},
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{
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"cell_type": "markdown",
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"id": "1cb8c216",
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"metadata": {},
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"source": [
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"Il est possible de transformer les types. Pour cela, Python utilise les trois fonctions suivantes\n",
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"\n",
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"- `int(...)`\n",
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"- `str(...)`\n",
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"- `float(...)`\n",
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"\n",
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"2. Quelques exemples d'utilisation de la fonction `int(...)`. Les exécuter."
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "d5643413",
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"metadata": {},
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"outputs": [],
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"source": [
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"int(a)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "8cce59f4",
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"metadata": {},
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"outputs": [],
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"source": [
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"int(b)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "67595ac0",
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"metadata": {},
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"outputs": [],
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"source": [
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"int(c)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "730d8ec6",
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"metadata": {},
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"outputs": [],
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"source": [
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"int(d)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "3288e311",
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"metadata": {},
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"outputs": [],
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"source": [
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"int(g)"
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]
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},
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{
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"cell_type": "markdown",
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"id": "fa9adefe",
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"metadata": {},
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"source": [
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"En quoi la fonction `int(...)` tranforme-t-elle les variables?"
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]
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},
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{
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"cell_type": "raw",
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"id": "46b49780",
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"metadata": {},
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"source": []
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},
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{
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"cell_type": "markdown",
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"id": "8ef9fb28",
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"metadata": {},
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"source": [
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"3. Expérimenter la fonction `float(...)`."
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "d22272b4",
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"metadata": {},
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"outputs": [],
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"source": []
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},
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{
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"cell_type": "markdown",
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"id": "5b822091",
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"metadata": {},
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"source": [
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"En quoi la fonction `float(...)` tranforme-t-elle les variables?"
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]
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},
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{
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"cell_type": "raw",
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"id": "2cc489e3",
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"metadata": {},
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"source": []
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},
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{
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"cell_type": "markdown",
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"id": "5da8293d",
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"metadata": {},
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"source": [
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"3. Expérimenter la fonction `str(...)`."
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "332877f7",
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"metadata": {},
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"outputs": [],
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"source": []
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},
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{
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"cell_type": "markdown",
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"id": "da5cd3ea",
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"metadata": {},
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"source": [
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"En quoi la fonction `str(...)` tranforme-t-elle les variables?"
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]
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},
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{
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"cell_type": "raw",
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"id": "8bcf3f94",
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"metadata": {},
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"source": []
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},
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{
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"cell_type": "markdown",
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"id": "3f3ea6f9",
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"metadata": {},
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"source": [
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"4. La fonction `input(...)` affiche du texte et attend un réponse."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 8,
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"id": "afc36b4e",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Comment tu t'appelles?fjdsklmq\n"
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]
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},
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{
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"data": {
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"text/plain": [
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"'fjdsklmq'"
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]
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},
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"execution_count": 8,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"reponse = input(\"Comment tu t'appelles?\")\n",
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"reponse"
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]
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},
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{
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"cell_type": "markdown",
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"id": "f7e096e1",
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"metadata": {},
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"source": [
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"Quel est le type de la variable `reponse`"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "9518e549",
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"metadata": {},
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"outputs": [],
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"source": []
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},
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{
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"cell_type": "markdown",
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"id": "7aba1ac5",
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"metadata": {},
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"source": [
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"## Exercices\n",
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"\n",
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"Dans les éxercices suivants vous devrez coder un programme qui fait ce qu'il est décrit. Vous pouvez les faire dans l'ordre que vous souhaitez."
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]
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},
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{
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"cell_type": "markdown",
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"id": "47fa675c",
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"metadata": {},
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"source": [
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"### Variation d'une grandeur\n",
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"\n",
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"Écrire un programme qui\n",
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"\n",
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" demande la valeur initiale\n",
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" demande le taux d'évolution\n",
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" affiche la valeur finale"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "d885f2a5",
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"metadata": {},
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"outputs": [],
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"source": []
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},
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{
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"cell_type": "markdown",
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"id": "a368cdbe",
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"metadata": {},
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"source": [
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"## Taux de variation\n",
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"\n",
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"Écrire un programme qui\n",
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"\n",
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" demande la valeur initiale\n",
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" demande la valeur finale\n",
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" affiche le taux d'évolution\n"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "05f03257",
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"metadata": {},
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"outputs": [],
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"source": []
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},
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{
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"cell_type": "markdown",
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"id": "b540018d",
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"metadata": {},
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"source": [
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"### Coordonnées du milieu\n",
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"\n",
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"Écrire un programme qui\n",
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"\n",
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" demande l'abscisse du point A\n",
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" demande l'ordonnée du point A\n",
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" demande l'abscisse du point B\n",
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" demande l'ordonnée du point B\n",
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" stock l'abscisse du milieu du segment [AB]\n",
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" stock l'ordonnée du milieu du segment [AB]\n",
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" affiche les coordonnées du milieu du segment [AB]\n",
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" "
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "4ad529dc",
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"metadata": {},
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"outputs": [],
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"source": []
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},
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{
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"cell_type": "markdown",
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"id": "fdb3ba0c",
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"metadata": {},
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"source": [
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"### Distance entre deux points\n",
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"\n",
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"Écrire un programme qui\n",
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"\n",
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" demande l'abscisse du point A\n",
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" demande l'ordonnée du point A\n",
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" demande l'abscisse du point B\n",
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" demande l'ordonnée du point B\n",
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" affiche la distance AB\n",
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" \n",
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"Pour calculer la racine carré, vous aurez besoin d'importer la fonction `sqrt`. Pour cela, votre programme devra commencer par la ligne suivante\n",
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"\n",
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" from math import sqrt"
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3 (ipykernel)",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.10.2"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}
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