{"id":520,"date":"2022-11-09T14:46:02","date_gmt":"2022-11-09T06:46:02","guid":{"rendered":"https:\/\/yyshell.com\/?p=520"},"modified":"2022-11-09T14:46:02","modified_gmt":"2022-11-09T06:46:02","slug":"python-if%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/yyshell.com\/?p=520","title":{"rendered":"Python if\u8bed\u53e5"},"content":{"rendered":"\r\n

\u5728\u5f88\u591a\u7f16\u7a0b\u8bed\u8a00\u4e2d\uff0c\u90fd\u4f1a\u4f7f\u7528if\u8bed\u53e5\u6765\u8fdb\u884c\u5224\u5b9a\uff0cPython\u4e5f\u4e0d\u4f8b\u5916\u3002<\/p>\r\n\r\n\r\n\r\n

\u5148\u4e3e\u4e2a\u4f8b\u5b50<\/h4>\r\n
cars = ['audi', 'bmw', 'trump', 'dongfeng']\r\n\r\nfor car in cars:\r\n    if car == 'bmw':\r\n        print(car.upper())\r\n    else:\r\n        print(car.title())<\/pre>\r\n
\u8fd9\u4e2a\u793a\u4f8b\u901a\u8fc7\u4e00\u4e2afor\u5faa\u73af\u904d\u5386\u4e86cars\u5217\u8868\uff0c\u901a\u8fc7if\u6765\u5224\u5b9a\u6c7d\u8f66\u662f\u5426\u662fbmw\uff0c\u5982\u679c\u662f\uff0c\u600e\u4e48\u91c7\u7528\u5927\u5199\u5b57\u6bcd\uff0c\u5982\u679c\u4e0d\u662f\uff0c\u5219\u4ee5\u9996\u5b57\u6bcd\u5927\u5199\u7684\u65b9\u5f0f\u8f93\u51fa\u5176\u4ed6\u6c7d\u8f66\u54c1\u724c\u3002<\/p>\r\n
\u6761\u4ef6\u6d4b\u8bd5<\/h4>\r\n
\u6bcf\u4e2aif\u8bed\u53e5\u7684\u6838\u5fc3\u662f\u4e00\u4e2a\u503c\u4e3aTrue\u6216\u8005False\u7684\u4e00\u4e2a\u8868\u8fbe\u5f0f\u3002\u5982\u679c\u6761\u4ef6\u8868\u8fbe\u5f0f\u7684\u503c\u4e3aTrue\uff0c\u5219\u8f93\u51fa\u540e\u9762\u7684\u7ed3\u679c\uff0c\u5982\u679c\u4e3aFalse\uff0c\u5219\u5ffd\u7565\u8fd9\u4e9b\u4ee3\u7801\u3002<\/p>\r\n
\u5982\u4f55\u5224\u5b9a\u6761\u4ef6\u8868\u8fbe\u5f0f\u5462\uff1f<\/p>\r\n
\u68c0\u67e5\u662f\u5426\u76f8\u7b49<\/h4>\r\n
car == ‘bmw’
\u8fd9\u6837\u7684\u65b9\u5f0f\uff0c\u9700\u8981\u8bf4\u660e\u7684\u662f\uff0c\u5728python\u4e2d\uff0c\u5355\u4e2a=\u4e0d\u662f\u201c\u7b49\u4e8e\u53f7\u201d\uff0c\u5176\u5b9e\u662f\u8d4b\u503c\u7684\u7b26\u53f7\uff0c\u901a\u8fc7\u7528\u6765\u7ed9\u53d8\u91cf\u8d4b\u503c\u3002\u68c0\u67e5\u5927\u5c0f\u65f6\u662f\u533a\u5206\u5927\u5c0f\u5199\u7684\u3002<\/p>\r\n
\u68c0\u67e5\u662f\u5426\u4e0d\u76f8\u7b49<\/h4>\r\n
car = 'audi'\r\nif car != 'bmw':\r\n    print(\"The car is not the right answer.\")<\/pre>\r\n
\u68c0\u67e5\u591a\u4e2a\u6761\u4ef6<\/h4>\r\n
\u53ef\u4ee5\u901a\u8fc7and\u6216\u8005or\u6765\u68c0\u67e5\u591a\u4e2a\u6761\u4ef6\u3002\u4f8b\u5982\uff1a<\/p>\r\n
a = 10\r\nb = 20\r\nif a < 15 and b > 15:\r\n    print(\"this is True\")<\/pre>\r\n
and\u8868\u793a\uff0c\u53ea\u6709\u5f53\u4e24\u4e2a\u6216\u591a\u4e2a\u6761\u4ef6\u540c\u65f6\u4e3a\u771f\u7684\u65f6\u5019\uff0c\u6761\u4ef6\u624d\u6210\u7acb\u3002\u53cd\u4e4b\uff0cor\u4ee3\u8868\u4e24\u4e2a\u6216\u591a\u4e2a\u6761\u4ef6\uff0c\u53ea\u8981\u6709\u4e00\u4e2a\u6210\u7acb\uff0c\u5373\u90fd\u6210\u7acb\u3002\u8fd9\u91cc\u5c31\u4e0d\u4e00\u4e00\u5217\u4e3e\u4e86\u3002<\/p>\r\n
\u68c0\u67e5\u7279\u5b9a\u503c\u662f\u5426\u5728\u5217\u8868\u4e2d<\/h4>\r\n
cars = ['Audi', 'BMW', 'Benz', 'Tesla']\r\nif Tesla in cars:\r\n    print(\"Telsa is in the cars list\")<\/pre>\r\n
\u901a\u4fd7\u5730\u8bb2\uff0c\u5224\u65ad\u7279\u5b9a\u503c\u5728\u4e0d\u5728\u5217\u8868\u4e2d\uff0c\u7528\u7684\u662fin\u3002\u9700\u8981\u6ce8\u610f\u7684\u4e8b\uff0cpython\u4e2d\u4e8b\u533a\u5206\u5927\u5c0f\u5199\u7684\uff0c\u5982bmw\u5c31\u548cBMW\u662f\u4e24\u7801\u4e8b\u3002<\/p>\r\n
if-else\u7ed3\u6784<\/h4>\r\n
\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u5728\u4e00\u79cd\u6761\u4ef6\u4e0b\u6267\u884c\u4e00\u4e2a\u64cd\u4f5c\uff0c\u5728\u53e6\u5916\u4e00\u79cd\u6761\u4ef6\u4e0b\uff0c\u6267\u884c\u53e6\u5916\u7684\u64cd\u4f5c\u3002python\u53ef\u4ee5\u4f7f\u7528if-else \u8bed\u53e5\u5b9e\u73b0\u3002<\/p>\r\n
age = 18\r\nif age >= 18:\r\n    print(\"you are old enough to vote!\")\r\nelse:\r\n    print(\"sorry, you are too young.\")<\/pre>\r\n
\u5982\u679c\u6d89\u53ca\u591a\u79cd\u60c5\u51b5\uff0c\u53ef\u4ee5\u7528if-elif-else\u6765\u5904\u7406\u3002elif\u53ef\u4ee5\u8bbe\u5b9a\u591a\u4e2a\uff0c\u5df2\u6ee1\u8db3\u591a\u4e2a\u6761\u4ef6\u7684\u5904\u7406\u3002<\/p>\r\n\r\n\r\n\r\n\r\n\r\n
<\/p>\r\n
<\/p>","protected":false},"excerpt":{"rendered":"
\u5728\u5f88\u591a\u7f16\u7a0b\u8bed\u8a00\u4e2d\uff0c\u90fd\u4f1a\u4f7f\u7528if\u8bed\u53e5\u6765\u8fdb\u884c\u5224\u5b9a\uff0cPython\u4e5f\u4e0d\u4f8b\u5916\u3002 \u5148\u4e3e\u4e2a\u4f8b\u5b50<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[78],"tags":[],"class_list":["post-520","post","type-post","status-publish","format-standard","hentry","category-python"],"_links":{"self":[{"href":"https:\/\/yyshell.com\/index.php?rest_route=\/wp\/v2\/posts\/520","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yyshell.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yyshell.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yyshell.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yyshell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=520"}],"version-history":[{"count":9,"href":"https:\/\/yyshell.com\/index.php?rest_route=\/wp\/v2\/posts\/520\/revisions"}],"predecessor-version":[{"id":552,"href":"https:\/\/yyshell.com\/index.php?rest_route=\/wp\/v2\/posts\/520\/revisions\/552"}],"wp:attachment":[{"href":"https:\/\/yyshell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=520"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yyshell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=520"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yyshell.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=520"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}