hello

第二课.ipynb

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+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "9d496a34-c525-47a2-bc08-a132d0295be5",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "2\n"
+     ]
+    }
+   ],
+   "source": [
+    "a=1+1\n",
+    "print(a)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "de78dde7-2bb7-4ac3-b8bd-97c0062a279f",
+   "metadata": {},
+   "outputs": [
+    {
+     "ename": "",
+     "evalue": "",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[1;31mRunning cells with 'c:\\Program Files\\Python39\\python.exe' requires the ipykernel package.\n",
+      "\u001b[1;31mRun the following command to install 'ipykernel' into the Python environment. \n",
+      "\u001b[1;31mCommand: '\"c:/Program Files/Python39/python.exe\" -m pip install ipykernel -U --user --force-reinstall'"
+     ]
+    }
+   ],
+   "source": [
+    "c=111+222\n",
+    "print(c)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 19,
+   "id": "f7fa69b1-cc2a-4460-8601-e3b5e35f3626",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "##2.1.结构的控制"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 17,
+   "id": "427f925d-5db2-4554-9502-b873b3375463",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "hello\n",
+      "word\n"
+     ]
+    }
+   ],
+   "source": [
+    "if False:\n",
+    "    print(\"hello\")\n",
+    "elif True:\n",
+    "    print(\"hello\")\n",
+    "    print(\"word\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 18,
+   "id": "d2acf1bf-74dd-4bd0-87e3-4eff3098aee3",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "726\n"
+     ]
+    }
+   ],
+   "source": [
+    "a=22*33\n",
+    "print(a)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "23c3fe61-246b-4837-af71-31e5921b3f11",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "## 2.2. 条件"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 26,
+   "id": "70293327-4778-46ca-aff3-237c5ceef229",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "请输入一个数: 336\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\u001b[33;41m336是偶函数!\n"
+     ]
+    }
+   ],
+   "source": [
+    "num = input(\"请输入一个数:\")\n",
+    "num = int(num)\n",
+    "if num % 2 == 0:\n",
+    "    print(F\"\\033[33;41m{num}是偶函数!\")\n",
+    "else:\n",
+    "    print(F\"{num}是奇数!\")\n",
+    "    "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1b2a3cd6-0065-4d1a-81b5-af43590d19d8",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "          *          \n",
+      "         ***         \n",
+      "        *****        \n",
+      "       *******       \n",
+      "      *********      \n",
+      "     ***********     \n",
+      "    *************    \n",
+      "   ***************   \n",
+      "  *****************  \n",
+      " ******************* \n",
+      " ********************\n",
+      "  ****************** \n",
+      "   ****************  \n",
+      "    **************   \n",
+      "     ************    \n",
+      "      **********     \n",
+      "       ********      \n",
+      "        ******       \n",
+      "         ****        \n",
+      "          **         \n",
+      "                     \n"
+     ]
+    }
+   ],
+   "source": [
+    "r = 10\n",
+    "for y in range(2*r+1):\n",
+    "    for x in range(2*r+1):\n",
+    "        if y>=-x+r and y>=x-r and y<x+r and y<=-x+3*r:\n",
+    "            print(\"*\",end=\"\")\n",
+    "        else:\n",
+    "            print(\" \",end=\"\")\n",
+    "    print()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "847999d4-2ff3-49f5-ba16-804c067d7aa4",
+   "metadata": {},
+   "outputs": [
+    {
+     "ename": "",
+     "evalue": "",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[1;31mRunning cells with 'c:\\Program Files\\Python39\\python.exe' requires the ipykernel package.\n",
+      "\u001b[1;31mRun the following command to install 'ipykernel' into the Python environment. \n",
+      "\u001b[1;31mCommand: '\"c:/Program Files/Python39/python.exe\" -m pip install ipykernel -U --user --force-reinstall'"
+     ]
+    }
+   ],
+   "source": [
+    "b = True\n",
+    "num = input(\"输入一个被判断的整数\")\n",
+    "num = int(num)\n",
+    "for i in range(2,num):\n",
+    "    if num % i ==0:\n",
+    "        b = False\n",
+    "        break\n",
+    "    else:\n",
+    "        continue\n",
+    "if b:\n",
+    "    print(\"素数\")\n",
+    "else:\n",
+    "    print(\"和数\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 41,
+   "id": "00b1389b-086d-4980-a98f-d08e7e3aa261",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[2, 3, 5, 7]\n"
+     ]
+    }
+   ],
+   "source": [
+    "a = 100\n",
+    "result = [2]\n",
+    "for num in range(3,a,2):\n",
+    "    for i in range(2,num):\n",
+    "        if num % i ==0:\n",
+    "            b = False\n",
+    "            break\n",
+    "        else:\n",
+    "            continue\n",
+    "    if b:\n",
+    "        result.append(num)\n",
+    "print(result)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d0cdbeed-3c84-4f79-bec3-8969ea65dcf7",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.9.13"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}