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  {
   "cell_type": "markdown",
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   "metadata": {},
   "source": [
    "# Étape 2: Variables, affectation et type"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "01f35556",
   "metadata": {},
   "source": [
    "### Trois types de variables\n",
    "\n",
    "En informatique "
   ]
  },
  {
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  {
   "cell_type": "markdown",
   "id": "07c32553",
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   "source": [
    "`input` donne une chaine de caractère. Comment la transformer en int ou float"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "b11ee13b",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "978e9480",
   "metadata": {},
   "source": [
    "Opérations entre les types"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "4a7ca5f9",
   "metadata": {},
   "outputs": [],
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  {
   "cell_type": "markdown",
   "id": "192bd626",
   "metadata": {},
   "source": [
    "## Exercices\n",
    "\n",
    "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."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "d4e53096",
   "metadata": {},
   "source": [
    "### Variation d'une grandeur\n",
    "\n",
    "Écrire un programme qui\n",
    "\n",
    "    demande la valeur initiale\n",
    "    demande le taux d'évolution\n",
    "    affiche la valeur finale"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "eeb479d2",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "705276dc",
   "metadata": {},
   "source": [
    "## Taux de variation\n",
    "\n",
    "Écrire un programme qui\n",
    "\n",
    "    demande la valeur initiale\n",
    "    demande la valeur finale\n",
    "    affiche le taux d'évolution\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "b1a4755a",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "1037725f",
   "metadata": {},
   "source": [
    "### Coordonnées du milieu\n",
    "\n",
    "Écrire un programme qui\n",
    "\n",
    "    demande l'abscisse du point A\n",
    "    demande l'ordonnée du point A\n",
    "    demande l'abscisse du point B\n",
    "    demande l'ordonnée du point B\n",
    "    stock l'abscisse du milieu du segment [AB]\n",
    "    stock l'ordonnée du milieu du segment [AB]\n",
    "    affiche les coordonnées du milieu du segment [AB]\n",
    "    "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "c2b735ba",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "id": "4d3ce1bf",
   "metadata": {},
   "source": [
    "### Distance entre deux points\n",
    "\n",
    "Écrire un programme qui\n",
    "\n",
    "    demande l'abscisse du point A\n",
    "    demande l'ordonnée du point A\n",
    "    demande l'abscisse du point B\n",
    "    demande l'ordonnée du point B\n",
    "    affiche la distance AB\n",
    "    \n",
    "Pour calculer la racine carré, vous aurez besoin d'importer la fonction `sqrt`. Pour cela, votre programme devra commencer par la ligne suivante\n",
    "\n",
    "    from math import sqrt"
   ]
  }
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