Feat: fin du TP sur les variables

This commit is contained in:
Bertrand Benjamin 2022-02-18 11:14:22 +01:00
parent 084db581d7
commit e0530f0e33
1 changed files with 288 additions and 28 deletions

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@ -2,7 +2,7 @@
"cells": [
{
"cell_type": "markdown",
"id": "70d4a95c",
"id": "2c522bc1",
"metadata": {},
"source": [
"# Étape 2: Variables, affectation et type"
@ -10,57 +10,317 @@
},
{
"cell_type": "markdown",
"id": "01f35556",
"id": "7966e3c2",
"metadata": {},
"source": [
"### Trois types de variables\n",
"\n",
"En informatique "
"Pour nous (humain) les trois variables qui suivent sont itdentiques"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "3dfc05ea",
"execution_count": 1,
"id": "d366babc",
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"outputs": [
{
"data": {
"text/plain": [
"1"
]
},
"execution_count": 1,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"a = 1\n",
"a"
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "87873ff4",
"metadata": {},
"outputs": [
{
"data": {
"text/plain": [
"1.0"
]
},
"execution_count": 2,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"b = 1.0\n",
"b"
]
},
{
"cell_type": "code",
"execution_count": 3,
"id": "98f34ab7",
"metadata": {},
"outputs": [
{
"data": {
"text/plain": [
"'1'"
]
},
"execution_count": 3,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"c = \"1\"\n",
"c"
]
},
{
"cell_type": "markdown",
"id": "07c32553",
"id": "a1296b4f",
"metadata": {},
"source": [
"`input` donne une chaine de caractère. Comment la transformer en int ou float"
"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**."
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "b11ee13b",
"metadata": {},
"outputs": [],
"source": []
},
{
"cell_type": "markdown",
"id": "978e9480",
"id": "a65d6da0",
"metadata": {},
"source": [
"Opérations entre les types"
"1. Trier les variables suivantes en fonction de leur type"
]
},
{
"cell_type": "code",
"execution_count": 6,
"id": "86571601",
"metadata": {},
"outputs": [],
"source": [
"a = 3\n",
"b = 4.5\n",
"c = \"coucou\"\n",
"d = \"6\"\n",
"e = 8\n",
"f = 5.0\n",
"g = \"09\"\n",
"h = \"0.4\""
]
},
{
"cell_type": "raw",
"id": "708fea37",
"metadata": {},
"source": [
"Les entiers:\n",
"Les flottants:\n",
"Les chaines de caractères:"
]
},
{
"cell_type": "markdown",
"id": "1cb8c216",
"metadata": {},
"source": [
"Il est possible de transformer les types. Pour cela, Python utilise les trois fonctions suivantes\n",
"\n",
"- `int(...)`\n",
"- `str(...)`\n",
"- `float(...)`\n",
"\n",
"2. Quelques exemples d'utilisation de la fonction `int(...)`. Les exécuter."
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "4a7ca5f9",
"id": "d5643413",
"metadata": {},
"outputs": [],
"source": [
"int(a)"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "8cce59f4",
"metadata": {},
"outputs": [],
"source": [
"int(b)"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "67595ac0",
"metadata": {},
"outputs": [],
"source": [
"int(c)"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "730d8ec6",
"metadata": {},
"outputs": [],
"source": [
"int(d)"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "3288e311",
"metadata": {},
"outputs": [],
"source": [
"int(g)"
]
},
{
"cell_type": "markdown",
"id": "fa9adefe",
"metadata": {},
"source": [
"En quoi la fonction `int(...)` tranforme-t-elle les variables?"
]
},
{
"cell_type": "raw",
"id": "46b49780",
"metadata": {},
"source": []
},
{
"cell_type": "markdown",
"id": "8ef9fb28",
"metadata": {},
"source": [
"3. Expérimenter la fonction `float(...)`."
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "d22272b4",
"metadata": {},
"outputs": [],
"source": []
},
{
"cell_type": "markdown",
"id": "192bd626",
"id": "5b822091",
"metadata": {},
"source": [
"En quoi la fonction `float(...)` tranforme-t-elle les variables?"
]
},
{
"cell_type": "raw",
"id": "2cc489e3",
"metadata": {},
"source": []
},
{
"cell_type": "markdown",
"id": "5da8293d",
"metadata": {},
"source": [
"3. Expérimenter la fonction `str(...)`."
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "332877f7",
"metadata": {},
"outputs": [],
"source": []
},
{
"cell_type": "markdown",
"id": "da5cd3ea",
"metadata": {},
"source": [
"En quoi la fonction `str(...)` tranforme-t-elle les variables?"
]
},
{
"cell_type": "raw",
"id": "8bcf3f94",
"metadata": {},
"source": []
},
{
"cell_type": "markdown",
"id": "3f3ea6f9",
"metadata": {},
"source": [
"4. La fonction `input(...)` affiche du texte et attend un réponse."
]
},
{
"cell_type": "code",
"execution_count": 8,
"id": "afc36b4e",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Comment tu t'appelles?fjdsklmq\n"
]
},
{
"data": {
"text/plain": [
"'fjdsklmq'"
]
},
"execution_count": 8,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"reponse = input(\"Comment tu t'appelles?\")\n",
"reponse"
]
},
{
"cell_type": "markdown",
"id": "f7e096e1",
"metadata": {},
"source": [
"Quel est le type de la variable `reponse`"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "9518e549",
"metadata": {},
"outputs": [],
"source": []
},
{
"cell_type": "markdown",
"id": "7aba1ac5",
"metadata": {},
"source": [
"## Exercices\n",
@ -70,7 +330,7 @@
},
{
"cell_type": "markdown",
"id": "d4e53096",
"id": "47fa675c",
"metadata": {},
"source": [
"### Variation d'une grandeur\n",
@ -85,14 +345,14 @@
{
"cell_type": "code",
"execution_count": null,
"id": "eeb479d2",
"id": "d885f2a5",
"metadata": {},
"outputs": [],
"source": []
},
{
"cell_type": "markdown",
"id": "705276dc",
"id": "a368cdbe",
"metadata": {},
"source": [
"## Taux de variation\n",
@ -107,14 +367,14 @@
{
"cell_type": "code",
"execution_count": null,
"id": "b1a4755a",
"id": "05f03257",
"metadata": {},
"outputs": [],
"source": []
},
{
"cell_type": "markdown",
"id": "1037725f",
"id": "b540018d",
"metadata": {},
"source": [
"### Coordonnées du milieu\n",
@ -134,14 +394,14 @@
{
"cell_type": "code",
"execution_count": null,
"id": "c2b735ba",
"id": "4ad529dc",
"metadata": {},
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"source": []
},
{
"cell_type": "markdown",
"id": "4d3ce1bf",
"id": "fdb3ba0c",
"metadata": {},
"source": [
"### Distance entre deux points\n",