{
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  {
   "cell_type": "markdown",
   "id": "fcd43d67",
   "metadata": {},
   "source": [
    "# 09-06 · elif и вложенные условия\n",
    "\n",
    "Практика к разделу [«Условия продолжают накапливаться!»](../../site/chapters/glava-09/09-06-nakoplenie-uslovij-itogi.html)."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "9fab7001",
   "metadata": {},
   "source": [
    "## Цель\n",
    "\n",
    "Освоить цепочки elif и вложенные условия."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "d97841d5",
   "metadata": {},
   "source": [
    "## Рабочий пример"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "85c7cb3a",
   "metadata": {
    "execution": {
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     "iopub.status.idle": "2026-08-14T20:53:56.570042Z",
     "shell.execute_reply": "2026-08-14T20:53:56.569473Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Оценка: B\n"
     ]
    }
   ],
   "source": [
    "ocenka = 87\n",
    "if ocenka >= 90:\n",
    "    bukva = \"A\"\n",
    "elif ocenka >= 80:\n",
    "    bukva = \"B\"\n",
    "elif ocenka >= 70:\n",
    "    bukva = \"C\"\n",
    "else:\n",
    "    bukva = \"D\"\n",
    "\n",
    "print(f\"Оценка: {bukva}\")"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "3a85638b",
   "metadata": {},
   "source": [
    "## Эксперимент 1\n",
    "\n",
    "Проверьте несколько разных оценок через цикл (забегая немного вперёд, глава 10)."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "44549c78",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-14T20:53:56.571564Z",
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     "shell.execute_reply": "2026-08-14T20:53:56.574255Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "95 -> A\n",
      "82 -> B\n",
      "71 -> C\n",
      "40 -> D\n"
     ]
    }
   ],
   "source": [
    "for ocenka in [95, 82, 71, 40]:\n",
    "    if ocenka >= 90:\n",
    "        bukva = \"A\"\n",
    "    elif ocenka >= 80:\n",
    "        bukva = \"B\"\n",
    "    elif ocenka >= 70:\n",
    "        bukva = \"C\"\n",
    "    else:\n",
    "        bukva = \"D\"\n",
    "    print(ocenka, \"->\", bukva)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "15cc8b53",
   "metadata": {},
   "source": [
    "## Эксперимент 2 — вложенные условия"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "0bd3ba7d",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-14T20:53:56.576202Z",
     "iopub.status.busy": "2026-08-14T20:53:56.576073Z",
     "iopub.status.idle": "2026-08-14T20:53:56.578638Z",
     "shell.execute_reply": "2026-08-14T20:53:56.578223Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Можно водить машину.\n"
     ]
    }
   ],
   "source": [
    "age = 25\n",
    "has_license = True\n",
    "\n",
    "if age >= 18:\n",
    "    if has_license:\n",
    "        print(\"Можно водить машину.\")\n",
    "    else:\n",
    "        print(\"Сначала получите права.\")\n",
    "else:\n",
    "    print(\"Ещё рано водить машину.\")"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "3d014181",
   "metadata": {},
   "source": [
    "## Задание ★★ Самостоятельная задача\n",
    "\n",
    "Добавьте третий уровень вложенности: проверку наличия топлива (`has_fuel`)."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "80bd8af1",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-14T20:53:56.579654Z",
     "iopub.status.busy": "2026-08-14T20:53:56.579544Z",
     "iopub.status.idle": "2026-08-14T20:53:56.582103Z",
     "shell.execute_reply": "2026-08-14T20:53:56.581683Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Права есть, но бак пуст.\n"
     ]
    }
   ],
   "source": [
    "age = 25\n",
    "has_license = True\n",
    "has_fuel = False\n",
    "\n",
    "if age >= 18:\n",
    "    if has_license:\n",
    "        if has_fuel:\n",
    "            print(\"Можно ехать!\")\n",
    "        else:\n",
    "            print(\"Права есть, но бак пуст.\")\n",
    "    else:\n",
    "        print(\"Сначала получите права.\")\n",
    "else:\n",
    "    print(\"Ещё рано водить машину.\")"
   ]
  }
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