{"id":978010,"date":"2024-12-27T06:34:13","date_gmt":"2024-12-26T22:34:13","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/978010.html"},"modified":"2024-12-27T06:34:15","modified_gmt":"2024-12-26T22:34:15","slug":"python%e4%b8%adifelse%e5%a6%82%e4%bd%95%e7%94%a8","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/978010.html","title":{"rendered":"python\u4e2difelse\u5982\u4f55\u7528"},"content":{"rendered":"

\"python\u4e2difelse\u5982\u4f55\u7528\"<\/p>\n

\u5728Python\u4e2d\uff0cif<\/code>\u548celse<\/code>\u8bed\u53e5\u7528\u4e8e\u63a7\u5236\u7a0b\u5e8f\u7684\u6d41\u7a0b\uff0c\u6839\u636e\u6761\u4ef6\u7684\u771f\u6216\u5047\u6765\u51b3\u5b9a\u6267\u884c\u54ea\u6bb5\u4ee3\u7801\u3002\u5728Python\u4e2d\uff0cif<\/code>\u8bed\u53e5\u7528\u4e8e\u68c0\u67e5\u4e00\u4e2a\u6761\u4ef6\uff0c\u5982\u679c\u6761\u4ef6\u4e3a\u771f\uff0c\u5219\u6267\u884c\u76f8\u5e94\u7684\u4ee3\u7801\u5757\uff0c\u5426\u5219\u6267\u884celse<\/code>\u4ee3\u7801\u5757<\/strong>\u3001elif<\/code>\u7528\u4e8e\u5728if<\/code>\u548celse<\/code>\u4e4b\u95f4\u589e\u52a0\u66f4\u591a\u7684\u6761\u4ef6\u68c0\u67e5<\/strong>\u3001\u7f29\u8fdb\u5728Python\u4e2d\u975e\u5e38\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u51b3\u5b9a\u4e86\u4ee3\u7801\u5757\u7684\u8303\u56f4<\/strong>\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u5728Python\u4e2d\u4f7f\u7528if<\/code>\u3001elif<\/code>\u548celse<\/code>\u8bed\u53e5\u7684\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n<\/p>\n

\u4e00\u3001IF\u8bed\u53e5\u7684\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n

if<\/code>\u8bed\u53e5\u662f\u6761\u4ef6\u8bed\u53e5\u7684\u6838\u5fc3\u90e8\u5206\uff0c\u7528\u4e8e\u6d4b\u8bd5\u4e00\u4e2a\u8868\u8fbe\u5f0f\u3002\u5982\u679c\u8be5\u8868\u8fbe\u5f0f\u4e3a\u771f\uff0c\u5219\u6267\u884c\u540e\u7eed\u7684\u4ee3\u7801\u5757\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n

age = 18<\/p>\n
if age >= 18:<\/p>\n
    print("You are an adult.")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u68c0\u67e5age<\/code>\u53d8\u91cf\u662f\u5426\u5927\u4e8e\u6216\u7b49\u4e8e18\uff0c\u5982\u679c\u662f\uff0c\u5219\u8f93\u51fa\u201cYou are an adult.\u201d\u3002\u6ce8\u610f\u7f29\u8fdb\uff1aPython\u4f7f\u7528\u7f29\u8fdb\u6765\u8868\u793a\u4ee3\u7801\u5757\u7684\u8303\u56f4\uff0c\u8fd9\u4f7f\u5f97\u4ee3\u7801\u66f4\u5177\u53ef\u8bfb\u6027\u3002<\/strong><\/p>\n<\/p>\n
\u4e8c\u3001ELSE\u8bed\u53e5\u7684\u4f7f\u7528<\/h3>\n<\/p>\n
else<\/code>\u8bed\u53e5\u7528\u4e8e\u5728if<\/code>\u6761\u4ef6\u4e0d\u6210\u7acb\u65f6\u6267\u884c\u53e6\u4e00\u6bb5\u4ee3\u7801\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u4e2a\u9ed8\u8ba4\u7684\u64cd\u4f5c\u8def\u5f84\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n
age = 16<\/p>\n
if age >= 18:<\/p>\n
    print("You are an adult.")<\/p>\n
else:<\/p>\n
    print("You are not an adult.")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5982\u679cage<\/code>\u5c0f\u4e8e18\uff0c\u5219\u4f1a\u8f93\u51fa\u201cYou are not an adult.\u201d\u3002else<\/code>\u8bed\u53e5\u6ca1\u6709\u6761\u4ef6\uff0c\u5b83\u603b\u662f\u5728if<\/code>\u6761\u4ef6\u4e3a\u5047\u65f6\u6267\u884c\u3002<\/strong><\/p>\n<\/p>\n
\u4e09\u3001ELIF\u8bed\u53e5\u7684\u4f7f\u7528<\/h3>\n<\/p>\n
elif<\/code>\u8bed\u53e5\uff08\u5373\u201celse if\u201d\u7684\u7f29\u5199\uff09\u5141\u8bb8\u68c0\u67e5\u591a\u4e2a\u8868\u8fbe\u5f0f\uff0c\u4ee5\u4fbf\u5728\u627e\u5230\u4e00\u4e2a\u4e3a\u771f\u7684\u8868\u8fbe\u5f0f\u65f6\u6267\u884c\u76f8\u5e94\u7684\u4ee3\u7801\u5757\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n
age = 20<\/p>\n
if age < 18:<\/p>\n
    print("You are a minor.")<\/p>\n
elif age == 18:<\/p>\n
    print("You just became an adult.")<\/p>\n
else:<\/p>\n
    print("You are an adult.")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u7a0b\u5e8f\u4f1a\u4f9d\u6b21\u68c0\u67e5\u6bcf\u4e2a\u6761\u4ef6\uff0c\u76f4\u5230\u627e\u5230\u4e3a\u771f\u7684\u6761\u4ef6\u5e76\u6267\u884c\u5176\u4ee3\u7801\u5757\u3002elif<\/code>\u8bed\u53e5\u53ef\u4ee5\u6709\u591a\u4e2a\uff0c\u5141\u8bb8\u8fdb\u884c\u591a\u91cd\u6761\u4ef6\u68c0\u67e5\u3002<\/strong><\/p>\n<\/p>\n
\u56db\u3001\u5d4c\u5957IF\u8bed\u53e5<\/h3>\n<\/p>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u5728\u4e00\u4e2aif<\/code>\u6216else<\/code>\u4ee3\u7801\u5757\u4e2d\u5d4c\u5957\u53e6\u4e00\u4e2aif<\/code>\u8bed\u53e5\u3002\u8fd9\u5141\u8bb8\u8fdb\u884c\u66f4\u590d\u6742\u7684\u6761\u4ef6\u68c0\u67e5\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n
age = 21<\/p>\n
if age >= 18:<\/p>\n
    if age >= 21:<\/p>\n
        print("You can drink alcohol.")<\/p>\n
    else:<\/p>\n
        print("You are an adult but cannot drink alcohol.")<\/p>\n
else:<\/p>\n
    print("You are not an adult.")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u68c0\u67e5age<\/code>\u662f\u5426\u5927\u4e8e\u6216\u7b49\u4e8e18\uff0c\u7136\u540e\u518d\u68c0\u67e5\u662f\u5426\u5927\u4e8e\u6216\u7b49\u4e8e21\u3002\u8fd9\u79cd\u5d4c\u5957\u7ed3\u6784\u7528\u4e8e\u5904\u7406\u66f4\u590d\u6742\u7684\u903b\u8f91\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u6761\u4ef6\u8868\u8fbe\u5f0f\uff08\u53c8\u79f0\u4e09\u5143\u8fd0\u7b97\u7b26\uff09<\/h3>\n<\/p>\n
Python\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u6d01\u7684\u65b9\u5f0f\u6765\u7f16\u5199\u7b80\u5355\u7684if-else<\/code>\u8bed\u53e5\uff0c\u79f0\u4e3a\u6761\u4ef6\u8868\u8fbe\u5f0f\u6216\u4e09\u5143\u8fd0\u7b97\u7b26\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<\/p>\n
result = "Adult" if age >= 18 else "Minor"<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u884c\u4ee3\u7801\u7b49\u4ef7\u4e8e\uff1a<\/p>\n<\/p>\n
if age >= 18:<\/p>\n
    result = "Adult"<\/p>\n
else:<\/p>\n
    result = "Minor"<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u8868\u8fbe\u5f0f\u901a\u5e38\u7528\u4e8e\u7b80\u5316\u4ee3\u7801\u5e76\u63d0\u9ad8\u53ef\u8bfb\u6027\uff0c\u7279\u522b\u662f\u5728\u9700\u8981\u8fd4\u56de\u4e00\u4e2a\u503c\u7684\u60c5\u51b5\u4e0b\u3002<\/strong><\/p>\n<\/p>\n
\u516d\u3001\u603b\u7ed3\u548c\u6700\u4f73\u5b9e\u8df5<\/h3>\n<\/p>\n
\u4f7f\u7528if-else<\/code>\u8bed\u53e5\u65f6\uff0c\u786e\u4fdd\u6761\u4ef6\u6e05\u6670\u4e14\u6613\u4e8e\u7406\u89e3\u3002\u8fc7\u591a\u7684\u5d4c\u5957\u53ef\u80fd\u4f1a\u4f7f\u4ee3\u7801\u96be\u4ee5\u9605\u8bfb\uff0c\u56e0\u6b64\u5e94\u5c3d\u91cf\u907f\u514d\u3002\u4f7f\u7528\u6761\u4ef6\u8868\u8fbe\u5f0f\u53ef\u4ee5\u7b80\u5316\u4ee3\u7801\uff0c\u4f46\u4e0d\u8981\u8fc7\u5ea6\u4f7f\u7528\uff0c\u4ee5\u514d\u5f71\u54cd\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3002\u6700\u540e\uff0c\u59cb\u7ec8\u6ce8\u610f\u7f29\u8fdb\uff0c\u56e0\u4e3a\u5b83\u5728Python\u4e2d\u7528\u4e8e\u5b9a\u4e49\u4ee3\u7801\u5757\u7684\u8303\u56f4\u3002<\/p>\n<\/p>\n
\u901a\u8fc7\u638c\u63e1\u8fd9\u4e9b\u57fa\u672c\u548c\u9ad8\u7ea7\u7528\u6cd5\uff0c\u60a8\u53ef\u4ee5\u5728Python\u4e2d\u7f16\u5199\u66f4\u9ad8\u6548\u3001\u66f4\u53ef\u8bfb\u7684\u6761\u4ef6\u903b\u8f91\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u4f7f\u7528if-else\u8bed\u53e5\u8fdb\u884c\u6761\u4ef6\u5224\u65ad\uff1f<\/strong>
\u5728Python\u4e2d\uff0cif-else\u8bed\u53e5\u7528\u4e8e\u6839\u636e\u7279\u5b9a\u6761\u4ef6\u6267\u884c\u4e0d\u540c\u7684\u4ee3\u7801\u5757\u3002\u57fa\u672c\u8bed\u6cd5\u7ed3\u6784\u5982\u4e0b\uff1a  <\/p>\n
if condition:\n    # \u5f53\u6761\u4ef6\u4e3a\u771f\u65f6\u6267\u884c\u7684\u4ee3\u7801\nelse:\n    # \u5f53\u6761\u4ef6\u4e3a\u5047\u65f6\u6267\u884c\u7684\u4ee3\u7801\n<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u68c0\u67e5\u4e00\u4e2a\u6570\u5b57\u662f\u5426\u4e3a\u6b63\u6570\uff0c\u5982\u679c\u662f\uff0c\u5219\u8f93\u51fa\u201c\u6b63\u6570\u201d\uff0c\u5426\u5219\u8f93\u51fa\u201c\u975e\u6b63\u6570\u201d\u3002<\/p>\n
\u53ef\u4ee5\u5728if\u8bed\u53e5\u4e2d\u4f7f\u7528\u54ea\u4e9b\u6bd4\u8f83\u8fd0\u7b97\u7b26\uff1f<\/strong>
Python\u652f\u6301\u591a\u79cd\u6bd4\u8f83\u8fd0\u7b97\u7b26\uff0c\u5305\u62ec==<\/code>\uff08\u7b49\u4e8e\uff09\u3001!=<\/code>\uff08\u4e0d\u7b49\u4e8e\uff09\u3001><\/code>\uff08\u5927\u4e8e\uff09\u3001<<\/code>\uff08\u5c0f\u4e8e\uff09\u3001>=<\/code>\uff08\u5927\u4e8e\u7b49\u4e8e\uff09\u548c<=<\/code>\uff08\u5c0f\u4e8e\u7b49\u4e8e\uff09\u3002\u901a\u8fc7\u8fd9\u4e9b\u8fd0\u7b97\u7b26\uff0c\u60a8\u53ef\u4ee5\u521b\u5efa\u590d\u6742\u7684\u6761\u4ef6\u8868\u8fbe\u5f0f\uff0c\u4ee5\u6ee1\u8db3\u4e0d\u540c\u7684\u903b\u8f91\u9700\u6c42\u3002<\/p>\n
\u5982\u4f55\u5728if-else\u8bed\u53e5\u4e2d\u5904\u7406\u591a\u4e2a\u6761\u4ef6\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528elif\uff08\u5373\u201celse if\u201d\uff09\u6765\u5904\u7406\u591a\u4e2a\u6761\u4ef6\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a  <\/p>\n
if condition1:\n    # \u5f53condition1\u4e3a\u771f\u65f6\u6267\u884c\u7684\u4ee3\u7801\nelif condition2:\n    # \u5f53condition2\u4e3a\u771f\u65f6\u6267\u884c\u7684\u4ee3\u7801\nelse:\n    # \u5f53\u4e0a\u8ff0\u6761\u4ef6\u90fd\u4e0d\u6ee1\u8db3\u65f6\u6267\u884c\u7684\u4ee3\u7801\n<\/code><\/pre>\n
\u8fd9\u6837\uff0c\u53ef\u4ee5\u6839\u636e\u4e0d\u540c\u7684\u6761\u4ef6\u8fdb\u884c\u7075\u6d3b\u7684\u5224\u65ad\u548c\u5904\u7406\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0cif\u548celse\u8bed\u53e5\u7528\u4e8e\u63a7\u5236\u7a0b\u5e8f\u7684\u6d41\u7a0b\uff0c\u6839\u636e\u6761\u4ef6\u7684\u771f\u6216\u5047\u6765\u51b3\u5b9a\u6267\u884c\u54ea\u6bb5\u4ee3\u7801\u3002\u5728Python\u4e2d\uff0c […]","protected":false},"author":3,"featured_media":978017,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/978010"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=978010"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/978010\/revisions"}],"predecessor-version":[{"id":978019,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/978010\/revisions\/978019"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/978017"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=978010"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=978010"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=978010"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}