{"rsdb":{"rid":"372434","subhead":"","postdate":"0","aid":"261440","fid":"77","uid":"1","topic":"1","content":"
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\u4e00.if\u8bed\u53e5<\/h1> \n

1.if\u8bed\u53e5<\/strong><\/h2> \n

\u4f5c\u7528:<\/strong>\u8ba9\u7a0b\u5e8f\u6839\u636e\u6761\u4ef6\u9009\u62e9\u6027\u5730\u6267\u884c\u67d0\u6761\u8bed\u53e5\u6216\u67d0\u4e9b\u8bed\u53e5<\/p> \n

\u8bf4\u660e:<\/strong>if\u8bed\u53e5\u53c8\u53eb\u6761\u4ef6\u8bed\u53e5,\u4e5f\u53eb\u5206\u652f\u8bed\u53e5<\/p> \n

\u8bed\u6cd5:<\/strong><\/p> \n

\n 
if<\/span> \u771f\u503c\u8868\u8fbe\u5f0f1:\r\n\r\n    \u8bed\u53e5\u57571\r\n\r\n<\/span>elif<\/span> \u771f\u503c\u8868\u8fbe\u5f0f2:\r\n\r\n   \u8bed\u53e5\u57572\r\n\r\n...\r\n\r\n<\/span>else<\/span>:\r\n\r\n  \u8bed\u53e5\u57574<\/span><\/pre> \n <\/div> \n 
 <\/p> \n 
\u8bed\u6cd5\u8bf4\u660e:<\/strong><\/p> \n 
     \n  
  • elif\u5b50\u53e5\u53ef\u4ee5\u67090\u4e2a,1\u4e2a\u6216\u591a\u4e2a<\/li> \n  
  • else\u5b50\u53e5\u53ef\u4ee5\u67090\u4e2a\u62161\u4e2a\u4e14\u53ea\u80fd\u653e\u5728\u6b64if\u8bed\u53e5\u7684\u6700\u540e<\/li> \n <\/ul> \n 
    \u8981\u6c42:<\/strong>if\u8bed\u53e5\u5185\u90e8\u7684\u8bed\u53e5\u901a\u5e38\u8981\u4ee54\u4e2a\u7a7a\u683c\u7684\u7f29\u8fdb\u6765\u8868\u793a\u5305\u542b\u5173\u7cfb,\u76f8\u540c\u7684\u7f29\u8fdb\u683c\u5f0f\u4ee3\u8868\u76f8\u540c\u7684\u6240\u5c5e\u7ea7\u522b<\/p> \n 
    \u793a\u4f8b:<\/strong><\/p> \n 
     \n  
    #<\/span> \u8f93\u5165\u4e00\u4e2a\u6570\u5b57\uff0c\u5224\u65ad\u8fd9\u4e2a\u6570\u662f0,\u8fd8\u662f\u6b63\u6570\uff0c\u8fd8\u662f\u8d1f\u6570<\/span>\r\n\r\nn <\/span>= int(input("<\/span>\u8bf7\u8f93\u5165\u4e00\u4e2a\u6570: <\/span>"<\/span>))\r\n\r\n<\/span>if<\/span> n == 0:\r\n<\/span>print<\/span>("<\/span>\u60a8\u8f93\u5165\u7684\u662f0<\/span>"<\/span>)\r\n<\/span>elif<\/span> n > 0:\r\n<\/span>print<\/span>("<\/span>\u60a8\u8f93\u5165\u7684\u662f\u6b63\u6570<\/span>"<\/span>) \r\n<\/span>else<\/span>:\r\n<\/span>print<\/span>("<\/span>\u60a8\u8f93\u5165\u7684\u662f\u8d1f\u6570<\/span>"<\/span>) <\/pre> \n <\/div> \n 
    if\u8bed\u53e5\u7684\u771f\u503c\u8868\u8fbe\u5f0f:<\/strong><\/p> \n 
     \n  
    if<\/span> 100:\r\n\r\n    <\/span>print<\/span>("<\/span>\u771f\u503c<\/span>"<\/span>)\r\n\r\n<\/span>#<\/span>\u7b49\u540c\u4e8e<\/span>\r\n\r\nif<\/span> bool(100):\r\n\r\n\u3000\u3000<\/span>print<\/span>("<\/span>\u771f\u503c<\/span>"<\/span>) <\/pre> \n <\/div> \n 
    2.if\u8bed\u53e5\u5d4c\u5957:<\/h2> \n 
       \n  
    • if\u8bed\u53e5\u672c\u8eab\u662f\u7531\u591a\u6761\u5b50\u53e5\u7ec4\u6210\u7684\u4e00\u6761\u590d\u5408\u8bed\u53e5<\/li> \n  
    • if\u8bed\u53e5\u53ef\u4ee5\u4f5c\u4e3a\u8bed\u53e5\u5d4c\u5957\u5230\u53e6\u4e00\u4e2a\u8bed\u53e5\u7684\u5185\u90e8<\/li> \n <\/ul> \n 
      \u793a\u4f8b:<\/strong><\/p> \n 
       \n  
      #<\/span> \u6839\u636e\u8f93\u5165\u7684\u6708\u4efd\u6765\u5224\u65ad\u662f\u54ea\u513f\u4e2a\u5b63\u5ea6<\/span>\r\nmonth = int(input("<\/span>\u8bf7\u8f93\u5165\u6708\u4efd(1~12): <\/span>"<\/span>))\r\n\r\n<\/span>if<\/span> 1 <= month <= 12:\r\n<\/span>print<\/span>("<\/span>\u662f\u5408\u6cd5\u7684\u6708\u4efd<\/span>"<\/span>)\r\n<\/span>if<\/span> month <= 3:\r\n<\/span>print<\/span>("<\/span>\u6625\u5b63<\/span>"<\/span>)\r\n<\/span>elif<\/span> month <= 6:\r\n<\/span>print<\/span>("<\/span>\u590f\u5b63<\/span>"<\/span>)\r\n<\/span>elif<\/span> month <= 9:\r\n<\/span>print<\/span>("<\/span>\u79cb\u5b63<\/span>"<\/span>)\r\n<\/span>else<\/span>:\r\n<\/span>print<\/span>("<\/span>\u51ac\u5b63<\/span>"<\/span>)\r\n<\/span>else<\/span>:\r\n<\/span>print<\/span>("<\/span>\u60a8\u7684\u8f93\u5165\u6709\u8bef!<\/span>"<\/span>)<\/pre> \n <\/div> \n 
       <\/p> \n 
      \u4e8c.while\u8bed\u53e5<\/h1> \n 
      \u4f5c\u7528:<\/strong>\u6839\u636e\u4e00\u5b9a\u6761\u4ef6,\u91cd\u590d\u5730\u6267\u884c\u4e00\u6761\u8bed\u53e5\u6216\u591a\u6761\u8bed\u53e5<\/p> \n 
      \u8bed\u6cd5:<\/strong><\/p> \n 
       \n  
      while<\/span> \u771f\u503c\u8868\u8fbe\u5f0f:\r\n\r\n\u3000\u3000\u8bed\u53e5\u5757\r\n\r\n<\/span>else<\/span>:\r\n\r\n\u3000\u3000\u8bed\u53e5\u5757<\/span><\/pre> \n <\/div> \n 
       <\/p> \n 
      \u793a\u4f8b:<\/strong><\/p> \n 
       \n  
      #<\/span> \u6b64\u793a\u4f8b\u793a\u610fwhile \u8bed\u53e5\u7684\u7528\u6cd5<\/span>\r\n\r\ni <\/span>= 1 #<\/span> \u521b\u5efa\u4e00\u4e2a\u53d8\u91cf\uff0c\u7528\u6765\u63a7\u5236while\u5faa\u73af\u7684\u6b21\u6570<\/span>\r\nwhile<\/span> i < 20: #<\/span> \u5224\u65ad\u5faa\u73af\u6761\u4ef6,\u5982\u679c\u4e3a\u771f\u5219\u6267\u884c\u8bed\u53e5\u57571<\/span>\r\nprint<\/span>("<\/span>hello world!<\/span>"<\/span>)\r\ni <\/span>+= 1 #<\/span> \u4fee\u6539\u5faa\u73af\u53d8\u91cf<\/span>\r\nelse<\/span>:\r\n<\/span>print<\/span>("<\/span>\u6761\u4ef6\u4e0d\u6ee1\u8db3\uff0c\u5faa\u73af\u7ed3\u675f!<\/span>"<\/span>)\r\n\r\n<\/span>print<\/span>("<\/span>\u4e0a\u4e00\u6761while\u8bed\u53e5\u7ed3\u675f,\u6b64\u65f6\u53d8\u91cfi =<\/span>"<\/span>, i)<\/pre> \n <\/div> \n 
       <\/p> \n 
      while\u8bed\u53e5\u8bed\u6cd5\u8bf4\u660e:<\/strong><\/p> \n