{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'三个单引号多行注释：\\nprint(\"Hello World!\")\\nprint(\"Hello World!\")\\nprint(\"Hello World!\")'"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "'''三个单引号多行注释：\n",
    "print(\"Hello World!\")\n",
    "print(\"Hello World!\")\n",
    "print(\"Hello World!\")'''"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'三个双引号多行注释：\\nprint(\"Hello World!\")\\nprint(\"Hello World!\")\\nprint(\"Hello World!\")'"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "\"\"\"三个双引号多行注释：\n",
    "print(\"Hello World!\")\n",
    "print(\"Hello World!\")\n",
    "print(\"Hello World!\")\"\"\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Hello World!\n"
     ]
    }
   ],
   "source": [
    "#单行注释 输出\n",
    "print(\"Hello World!\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "小明\n"
     ]
    }
   ],
   "source": [
    "#定义一个变量并输出\n",
    "name=\"小明\"\n",
    "print(name)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "xxxxxxxxxx\n"
     ]
    }
   ],
   "source": [
    "print(\"x\"*10)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "dnt.dkill.net/now带你走进中医经络\n"
     ]
    }
   ],
   "source": [
    "print(\"dnt.dkill.net/now\",end='')\n",
    "print(\"带你走进中医经络\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "dnt.dkill.net/now带你走进中医经络\n"
     ]
    }
   ],
   "source": [
    "print(\"dnt.dkill.net/now\",end=\"\")\n",
    "print(\"带你走进中医经络\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "I'm \"OK\"!\n"
     ]
    }
   ],
   "source": [
    "#如果字符串内部既包含'又包含\"怎么办？可以用转义字符\\来标识\n",
    "print(\"I\\'m \\\"OK\\\"!\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\\\\\\t\\\\\n"
     ]
    }
   ],
   "source": [
    "# 如果字符串里面有很多字符都需要转义，就需要加很多\\，为了简化，Python还允许用r''表示''内部的字符串默认不转义\n",
    "print(r'\\\\\\t\\\\')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "我请你吃饭吧～\n",
      "晚上吃啥？\n",
      "去厕所，你说呢？\n"
     ]
    }
   ],
   "source": [
    "#如果字符串内部有很多换行，用\\n写在一行里不好阅读，为了简化，Python允许用'''...'''的格式表示多行内容\n",
    "print('''我请你吃饭吧～\n",
    "晚上吃啥？\n",
    "去厕所，你说呢？''')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "################## input用户输入 #############################"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "请输入用户名:萌萌哒\n",
      "请输入性别:男\n",
      "Name:萌萌哒,Gender:男\n"
     ]
    }
   ],
   "source": [
    "#定义一个变量name,用户输入将赋值给name\n",
    "name=input(\"请输入用户名:\")\n",
    "\n",
    "#定义一个变量gender，用户输入将赋值给gender\n",
    "gender=input(\"请输入性别:\")\n",
    "\n",
    "#多个变量输出\n",
    "print(\"Name:%s,Gender:%s\"%(name,gender))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "xxx===\n"
     ]
    }
   ],
   "source": [
    "# 标识符是区分大小写的\n",
    "temp=\"xxx\"\n",
    "tEmp=\"===\"\n",
    "print(temp+tEmp)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "输入第一个数字10\n",
      "输入第二个数字2\n",
      "num1+num2=12\n"
     ]
    }
   ],
   "source": [
    "# 求和\n",
    "num1=input(\"输入第一个数字\")\n",
    "num2=input(\"输入第二个数字\")\n",
    "\n",
    "print(\"num1+num2=%d\" %(int(num1)+int(num2)))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [],
   "source": [
    "################## ifelse #############################"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "成年了\n"
     ]
    }
   ],
   "source": [
    "age=19\n",
    "\n",
    "if age>=18:\n",
    "    print(\"成年了\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "七大姑曰：工作了吗？八大姨问：买房了吗？异性说：结婚了吗？\n"
     ]
    }
   ],
   "source": [
    "age=24\n",
    "\n",
    "if age>=23:\n",
    "    print(\"七大姑曰：工作了吗？八大姨问：买房了吗？异性说：结婚了吗？\")\n",
    "elif age>=18:\n",
    "    print(age)\n",
    "    print(\"成年了哇\")\n",
    "else:\n",
    "    print(\"好好学习天天向上\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "请输入（1-7)6\n",
      "星期六\n"
     ]
    }
   ],
   "source": [
    "input_int=int(input(\"请输入（1-7)\"))\n",
    "\n",
    "#if后面的:,tab格式,else if 现在是elif\n",
    "if input_int==1:\n",
    "    print(\"星期一\")\n",
    "elif input_int==2:\n",
    "    print(\"星期二\")\n",
    "elif input_int==3:\n",
    "    print(\"星期三\") \n",
    "elif input_int==4:\n",
    "    print(\"星期四\")\n",
    "elif input_int==5:\n",
    "    print(\"星期五\")\n",
    "elif input_int==6:\n",
    "    print(\"星期六\")\n",
    "elif input_int==7:\n",
    "    print(\"星期日\")\n",
    "else:\n",
    "    print(\"别闹\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [],
   "source": [
    "################## while #############################"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "10\n",
      "9\n",
      "8\n",
      "7\n",
      "6\n",
      "5\n",
      "4\n",
      "3\n",
      "2\n",
      "1\n"
     ]
    }
   ],
   "source": [
    "num=10\n",
    "\n",
    "while num>0: \n",
    "    print(num)\n",
    "    num-=1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "*\n",
      "**\n",
      "***\n",
      "****\n",
      "*****\n"
     ]
    }
   ],
   "source": [
    "i=1\n",
    "#输出一个三角形\n",
    "while i<6:\n",
    "    j=1\n",
    "    while j<=i:\n",
    "        print(\"*\",end=\"\")#不换行输出\n",
    "        j+=1\n",
    "    print(\"\")#下一行\n",
    "    i+=1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "5050\n"
     ]
    }
   ],
   "source": [
    "# 1~100求和\n",
    "i=1\n",
    "sum=0\n",
    "while i<=100:\n",
    "    sum+=i\n",
    "    i+=1\n",
    "print(sum)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "94879583644320\n",
      "94879583644320\n",
      "True\n",
      "94879583644352\n",
      "94879583644320\n",
      "False\n"
     ]
    }
   ],
   "source": [
    "# why not have ++ ?\n",
    "# python 中，变量是以内容为基准而不是像 c 中以变量名为基准，所以只要你的数字内容是5\n",
    "# 不管你起什么名字，这个变量的 ID 是相同的，同时也就说明了 python 中一个变量可以以多个名称访问\n",
    "a=5\n",
    "b=5\n",
    "\n",
    "print(id(a))\n",
    "print(id(b))\n",
    "print(a is b)\n",
    "a+=1\n",
    "\n",
    "print(id(a))\n",
    "print(id(b))\n",
    "print(a is b)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "################## for #############################"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "https://pan.baidu.com/s/1weaF2DGsgDzAcniRzNqfyQ\n",
      " end ...\n"
     ]
    }
   ],
   "source": [
    "#while循环一般通过数值是否满足来确定循环的条件\n",
    "#for循环一般是对能保存多个数据的变量，进行遍历\n",
    "name=\"https://pan.baidu.com/s/1weaF2DGsgDzAcniRzNqfyQ#mmd\"\n",
    "\n",
    "for i in name:\n",
    "    if i=='#':\n",
    "        break\n",
    "    print(i,end='')#另一种写法：print(\"%s\"%i,end=\"\")\n",
    "print('\\n end ...')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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