{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "6f06a2d5",
   "metadata": {},
   "source": [
    "# 10-22 · Pętla sentinel\n",
    "\n",
    "Praktyka do sekcji [„Search, Filter, and Summarize”"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "f5e8c930",
   "metadata": {},
   "source": [
    "## Cel\n",
    "\n",
    "Opanowanie cyklu sentinel to specjalne znaczenie jako sygnał stop."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "b4a879be",
   "metadata": {},
   "source": [
    "## Pro input() w tym laptopie\n",
    "\n",
    "Ten laptop jest automatyczny, bez żywej osoby przy klawiaturze – dlatego tu jest `input()` tymczasowo zastąpione wcześniej przygotowanymi odpowiedziami."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "97f5b113",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-16T20:12:55.646985Z",
     "iopub.status.busy": "2026-08-16T20:12:55.646873Z",
     "iopub.status.idle": "2026-08-16T20:12:55.677488Z",
     "shell.execute_reply": "2026-08-16T20:12:55.676959Z"
    }
   },
   "outputs": [],
   "source": [
    "_answers = iter(['5', '10', 'stop'])\n",
    "\n",
    "def input(prompt=\"\"):\n",
    "    answer = next(_answers)\n",
    "    print(prompt + answer)\n",
    "    return answer"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "b46c7c06",
   "metadata": {},
   "source": [
    "## Podstawowa praktyka zadań ★"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "c7135d76",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-16T20:12:55.678507Z",
     "iopub.status.busy": "2026-08-16T20:12:55.678380Z",
     "iopub.status.idle": "2026-08-16T20:12:55.681049Z",
     "shell.execute_reply": "2026-08-16T20:12:55.680563Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Введите число (stop — закончить): 5\n",
      "Введите число (stop — закончить): 10\n",
      "Введите число (stop — закончить): stop\n",
      "Сумма: 15\n"
     ]
    }
   ],
   "source": [
    "summa = 0\n",
    "while True:\n",
    "    chislo = input(\"Введите число (stop — закончить): \")\n",
    "    if chislo == \"stop\":\n",
    "        break\n",
    "    summa += int(chislo)\n",
    "print(\"Сумма:\", summa)"
   ]
  }
 ],
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