{"id":935495,"date":"2024-12-26T18:54:50","date_gmt":"2024-12-26T10:54:50","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/935495.html"},"modified":"2024-12-26T18:54:52","modified_gmt":"2024-12-26T10:54:52","slug":"python%e5%a6%82%e4%bd%95%e6%b1%82n","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/935495.html","title":{"rendered":"python\u5982\u4f55\u6c42n"},"content":{"rendered":"

\"python\u5982\u4f55\u6c42n\"<\/p>\n

\u5728Python\u4e2d\u6c42n\u7684\u5e38\u89c1\u65b9\u6cd5\u6709\u4ee5\u4e0b\u51e0\u79cd\uff1a\u4f7f\u7528\u5faa\u73af\u3001\u9012\u5f52\u3001\u6570\u5b66\u516c\u5f0f\u3002<\/strong>\u5728\u5176\u4e2d\uff0c\u4f7f\u7528\u6570\u5b66\u516c\u5f0f\u901a\u5e38\u662f\u6700\u6709\u6548\u7684\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5b83\u80fd\u5728\u4e0d\u6d88\u8017\u989d\u5916\u8ba1\u7b97\u8d44\u6e90\u7684\u60c5\u51b5\u4e0b\u76f4\u63a5\u5f97\u5230\u7ed3\u679c\u3002\u63a5\u4e0b\u6765\u6211\u5c06\u8be6\u7ec6\u89e3\u91ca\u8fd9\u4e09\u79cd\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528\u5faa\u73af<\/p>\n<\/p>\n

\u4f7f\u7528\u5faa\u73af\u662f\u8ba1\u7b97n\u503c\u7684\u4e00\u79cd\u76f4\u63a5\u800c\u7b80\u5355\u7684\u65b9\u6cd5\u3002\u901a\u8fc7\u5faa\u73af\uff0c\u6211\u4eec\u53ef\u4ee5\u7d2f\u52a0\u6216\u8005\u7d2f\u4e58\u67d0\u4e2a\u503c\uff0c\u76f4\u5230\u8fbe\u5230\u6211\u4eec\u9700\u8981\u7684\u76ee\u6807\u3002<\/p>\n<\/p>\n

    \n
  1. \u7d2f\u52a0\u6cd5<\/strong><\/li>\n<\/ol>\n

    \u5047\u8bbe\u6211\u4eec\u9700\u8981\u8ba1\u7b971\u5230n\u7684\u548c\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684for\u5faa\u73af\u6765\u5b9e\u73b0\uff1a<\/p>\n<\/p>\n

    def sum_to_n(n):<\/p>\n
        total = 0<\/p>\n
        for i in range(1, n + 1):<\/p>\n
            total += i<\/p>\n
        return total<\/p>\n
    print(sum_to_n(10))  # \u8f93\u51fa: 55<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u5728\u8fd9\u4e2a\u51fd\u6570\u4e2d\uff0c\u6211\u4eec\u521d\u59cb\u5316\u4e00\u4e2atotal<\/code>\u53d8\u91cf\u4e3a0\uff0c\u7136\u540e\u4ece1\u5faa\u73af\u5230n\uff0c\u6bcf\u6b21\u5faa\u73af\u5c06\u5f53\u524d\u7684i\u503c\u52a0\u5230total<\/code>\u4e2d\u3002\u6700\u7ec8\uff0ctotal<\/code>\u7684\u503c\u5c31\u662f\u4ece1\u5230n\u7684\u548c\u3002<\/p>\n<\/p>\n
      \n
    1. \u7d2f\u4e58\u6cd5<\/strong><\/li>\n<\/ol>\n
      \u5982\u679c\u6211\u4eec\u9700\u8981\u8ba1\u7b97n\u7684\u9636\u4e58\uff0c\u5373\u4ece1\u4e58\u5230n\uff0c\u6211\u4eec\u540c\u6837\u53ef\u4ee5\u4f7f\u7528\u5faa\u73af\uff1a<\/p>\n<\/p>\n
      def factorial(n):<\/p>\n
          result = 1<\/p>\n
          for i in range(2, n + 1):<\/p>\n
              result *= i<\/p>\n
          return result<\/p>\n
      print(factorial(5))  # \u8f93\u51fa: 120<\/p>\n
      <\/code><\/pre>\n<\/p>\n
      \u8fd9\u91cc\u6211\u4eec\u4ece2\u5f00\u59cb\u5faa\u73af\u5230n\uff0c\u6bcf\u6b21\u5faa\u73af\u5c06\u5f53\u524d\u7684i\u503c\u4e58\u5230result<\/code>\u4e2d\u3002\u6700\u7ec8\uff0cresult<\/code>\u7684\u503c\u5c31\u662fn\u7684\u9636\u4e58\u3002<\/p>\n<\/p>\n
      \u4e8c\u3001\u4f7f\u7528\u9012\u5f52<\/p>\n<\/p>\n
      \u9012\u5f52\u662f\u4e00\u79cd\u8ba1\u7b97\u95ee\u9898\u7684\u65b9\u5f0f\uff0c\u5176\u4e2d\u51fd\u6570\u8c03\u7528\u81ea\u8eab\u4ee5\u6c42\u89e3\u95ee\u9898\u3002<\/p>\n<\/p>\n
        \n
      1. \u9012\u5f52\u6c42\u548c<\/strong><\/li>\n<\/ol>\n
        \u4f7f\u7528\u9012\u5f52\u6c421\u5230n\u7684\u548c\uff1a<\/p>\n<\/p>\n
        def sum_to_n(n):<\/p>\n
            if n == 1:<\/p>\n
                return 1<\/p>\n
            else:<\/p>\n
                return n + sum_to_n(n - 1)<\/p>\n
        print(sum_to_n(10))  # \u8f93\u51fa: 55<\/p>\n
        <\/code><\/pre>\n<\/p>\n
        \u5728\u8fd9\u4e2a\u9012\u5f52\u51fd\u6570\u4e2d\uff0csum_to_n<\/code>\u51fd\u6570\u901a\u8fc7\u4e0d\u65ad\u8c03\u7528\u81ea\u8eab\u6765\u7d2f\u52a0n\u503c\u3002\u5f53n\u7b49\u4e8e1\u65f6\uff0c\u9012\u5f52\u505c\u6b62\u5e76\u8fd4\u56de1\u3002<\/p>\n<\/p>\n
          \n
        1. \u9012\u5f52\u6c42\u9636\u4e58<\/strong><\/li>\n<\/ol>\n
          \u4f7f\u7528\u9012\u5f52\u6c42n\u7684\u9636\u4e58\uff1a<\/p>\n<\/p>\n
          def factorial(n):<\/p>\n
              if n == 1:<\/p>\n
                  return 1<\/p>\n
              else:<\/p>\n
                  return n * factorial(n - 1)<\/p>\n
          print(factorial(5))  # \u8f93\u51fa: 120<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          \u7c7b\u4f3c\u4e8e\u9012\u5f52\u6c42\u548c\uff0cfactorial<\/code>\u51fd\u6570\u8c03\u7528\u81ea\u8eab\u4ee5\u8ba1\u7b97n\u7684\u9636\u4e58\u3002\u9012\u5f52\u7ec8\u6b62\u6761\u4ef6\u662fn\u7b49\u4e8e1\u65f6\u8fd4\u56de1\u3002<\/p>\n<\/p>\n
          \u4e09\u3001\u4f7f\u7528\u6570\u5b66\u516c\u5f0f<\/p>\n<\/p>\n
          \u6570\u5b66\u516c\u5f0f\u901a\u5e38\u662f\u6c42\u89e3\u6570\u5b66\u95ee\u9898\u7684\u6700\u6709\u6548\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5b83\u4eec\u63d0\u4f9b\u4e86\u4e00\u4e2a\u76f4\u63a5\u7684\u8ba1\u7b97\u516c\u5f0f\uff0c\u907f\u514d\u4e86\u5faa\u73af\u548c\u9012\u5f52\u5e26\u6765\u7684\u5f00\u9500\u3002<\/p>\n<\/p>\n
            \n
          1. \u6c42\u548c\u516c\u5f0f<\/strong><\/li>\n<\/ol>\n
            \u4ece1\u5230n\u7684\u548c\u53ef\u4ee5\u7528\u6570\u5b66\u516c\u5f0f\u76f4\u63a5\u6c42\u89e3\uff1a<\/p>\n<\/p>\n
            [ S = \\frac{n(n + 1)}{2} ]<\/p>\n<\/p>\n
            \u4f7f\u7528\u8fd9\u4e2a\u516c\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u5e38\u6570\u65f6\u95f4\u5185\u8ba1\u7b97\u51fa1\u5230n\u7684\u548c\uff1a<\/p>\n<\/p>\n
            def sum_to_n(n):<\/p>\n
                return n * (n + 1) \/\/ 2<\/p>\n
            print(sum_to_n(10))  # \u8f93\u51fa: 55<\/p>\n
            <\/code><\/pre>\n<\/p>\n
              \n
            1. \u9636\u4e58\u516c\u5f0f<\/strong><\/li>\n<\/ol>\n
              \u867d\u7136\u6ca1\u6709\u4e00\u4e2a\u7b80\u5355\u7684\u6570\u5b66\u516c\u5f0f\u53ef\u4ee5\u76f4\u63a5\u8ba1\u7b97\u9636\u4e58\uff0c\u4f46Python\u7684math<\/code>\u6a21\u5757\u63d0\u4f9b\u4e86\u9ad8\u6548\u7684\u9636\u4e58\u8ba1\u7b97\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n
              import math<\/p>\n
              print(math.factorial(5))  # \u8f93\u51fa: 120<\/p>\n
              <\/code><\/pre>\n<\/p>\n
              \u4f7f\u7528math.factorial<\/code>\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u5feb\u901f\u8ba1\u7b97\u51fan\u7684\u9636\u4e58\uff0c\u8fd9\u4e2a\u51fd\u6570\u5185\u90e8\u5b9e\u73b0\u4e86\u4f18\u5316\u7684\u7b97\u6cd5\u3002<\/p>\n<\/p>\n
              \u56db\u3001\u5176\u4ed6\u65b9\u6cd5<\/p>\n<\/p>\n
              \u9664\u4e86\u4ee5\u4e0a\u63d0\u5230\u7684\u51e0\u79cd\u5e38\u89c1\u65b9\u6cd5\uff0c\u8fd8\u6709\u5176\u4ed6\u4e00\u4e9b\u7279\u5b9a\u573a\u666f\u4e0b\u6c42n\u503c\u7684\u65b9\u6cd5\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u3001\u5217\u8868\u63a8\u5bfc\u5f0f\u7b49Python\u7279\u6027\u6765\u8fdb\u884c\u67d0\u4e9b\u8ba1\u7b97\u3002<\/p>\n<\/p>\n
                \n
              1. \u751f\u6210\u5668\u8868\u8fbe\u5f0f<\/strong><\/li>\n<\/ol>\n
                \u751f\u6210\u5668\u8868\u8fbe\u5f0f\u53ef\u4ee5\u5728\u4e0d\u6784\u5efa\u5b8c\u6574\u5217\u8868\u7684\u60c5\u51b5\u4e0b\u8fdb\u884c\u6c42\u548c\u6216\u5176\u4ed6\u64cd\u4f5c\uff1a<\/p>\n<\/p>\n
                def sum_to_n(n):<\/p>\n
                    return sum(i for i in range(1, n + 1))<\/p>\n
                print(sum_to_n(10))  # \u8f93\u51fa: 55<\/p>\n
                <\/code><\/pre>\n<\/p>\n
                  \n
                1. \u5217\u8868\u63a8\u5bfc\u5f0f<\/strong><\/li>\n<\/ol>\n
                  \u5217\u8868\u63a8\u5bfc\u5f0f\u53ef\u4ee5\u7528\u4e8e\u8ba1\u7b97\u548c\u5176\u4ed6\u7d2f\u79ef\u64cd\u4f5c\uff0c\u4f46\u5728\u6c42\u548c\u95ee\u9898\u4e0a\u4e0d\u5982\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u9ad8\u6548\uff1a<\/p>\n<\/p>\n
                  def sum_to_n(n):<\/p>\n
                      return sum([i for i in range(1, n + 1)])<\/p>\n
                  print(sum_to_n(10))  # \u8f93\u51fa: 55<\/p>\n
                  <\/code><\/pre>\n<\/p>\n
                  \u4e94\u3001\u6027\u80fd\u548c\u4f18\u5316<\/p>\n<\/p>\n
                  \u5728\u9009\u62e9\u65b9\u6cd5\u65f6\uff0c\u6027\u80fd\u548c\u4f18\u5316\u662f\u975e\u5e38\u91cd\u8981\u7684\u8003\u8651\u56e0\u7d20\u3002\u9012\u5f52\u65b9\u6cd5\u5728Python\u4e2d\u53ef\u80fd\u5bfc\u81f4\u6808\u6ea2\u51fa\uff0c\u7279\u522b\u662f\u5728\u5904\u7406\u5927n\u503c\u65f6\uff0c\u56e0\u4e3aPython\u9ed8\u8ba4\u7684\u9012\u5f52\u6df1\u5ea6\u9650\u5236\u8f83\u4f4e\u3002\u5faa\u73af\u65b9\u6cd5\u867d\u7136\u76f4\u89c2\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u53ef\u80fd\u4e0d\u5982\u6570\u5b66\u516c\u5f0f\u9ad8\u6548\u3002\u6570\u5b66\u516c\u5f0f\u901a\u5e38\u662f\u6700\u4f18\u9009\u62e9\uff0c\u56e0\u4e3a\u5b83\u4eec\u80fd\u5728O(1)\u65f6\u95f4\u5185\u5b8c\u6210\u8ba1\u7b97\u3002<\/p>\n<\/p>\n
                  \u5728\u5904\u7406\u6c42\u548c\u548c\u9636\u4e58\u95ee\u9898\u65f6\uff0c\u9009\u62e9\u9002\u5408\u7684\u7b97\u6cd5\u548c\u5b9e\u73b0\u65b9\u5f0f\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u53ef\u8bfb\u6027\u3002\u5728\u5177\u4f53\u5e94\u7528\u4e2d\uff0c\u5e94\u8be5\u6839\u636e\u95ee\u9898\u7684\u89c4\u6a21\u548cPython\u63d0\u4f9b\u7684\u5185\u7f6e\u51fd\u6570\u6765\u9009\u62e9\u5408\u9002\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n<\/p>\n
                  \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
                   Python\u5982\u4f55\u8ba1\u7b97\u4e00\u4e2a\u6570\u5b57\u7684\u9636\u4e58\uff1f<\/strong>
                  \u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684math<\/code>\u6a21\u5757\u6765\u8ba1\u7b97\u9636\u4e58\u3002\u901a\u8fc7math.factorial(n)<\/code>\u51fd\u6570\uff0c\u53ef\u4ee5\u8f7b\u677e\u5f97\u5230n\u7684\u9636\u4e58\u3002\u4f8b\u5982\uff0cimport math; result = math.factorial(5)<\/code>\u5c06\u8fd4\u56de120\uff0c\u8fd9\u662f5\u7684\u9636\u4e58\u3002<\/p>\n
                  \u5728Python\u4e2d\u5982\u4f55\u6c42\u89e3\u6590\u6ce2\u90a3\u5951\u6570\u5217\u7684\u7b2cn\u9879\uff1f<\/strong>
                  \u8981\u8ba1\u7b97\u6590\u6ce2\u90a3\u5951\u6570\u5217\u7684\u7b2cn\u9879\uff0c\u53ef\u4ee5\u4f7f\u7528\u9012\u5f52\u3001\u8fed\u4ee3\u6216\u52a8\u6001\u89c4\u5212\u7684\u65b9\u6cd5\u3002\u4e00\u4e2a\u7b80\u5355\u7684\u8fed\u4ee3\u65b9\u6cd5\u5982\u4e0b\uff1a  <\/p>\n
                  def fibonacci(n):\n    a, b = 0, 1\n    for _ in range(n):\n        a, b = b, a + b\n    return a\n<\/code><\/pre>\n
                  \u8c03\u7528fibonacci(5)<\/code>\u5c06\u8fd4\u56de5\u7684\u6590\u6ce2\u90a3\u5951\u6570\uff0c\u53735\u3002<\/p>\n
                  \u5982\u4f55\u5728Python\u4e2d\u6c42\u89e3n\u7684\u5e73\u65b9\u6839\uff1f<\/strong>
                  Python\u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u5f0f\u6765\u8ba1\u7b97\u5e73\u65b9\u6839\u3002\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u4f7f\u7528math<\/code>\u6a21\u5757\u4e2d\u7684sqrt<\/code>\u51fd\u6570\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a  <\/p>\n
                  import math\nresult = math.sqrt(n)\n<\/code><\/pre>\n
                  \u8fd9\u5c06\u8fd4\u56den\u7684\u5e73\u65b9\u6839\u3002\u5982\u679c\u9700\u8981\u8ba1\u7b97\u5176\u4ed6\u6839\uff0c\u53ef\u4ee5\u4f7f\u7528\u5e42\u8fd0\u7b97\uff0c\u4f8b\u5982n ** (1\/3)<\/code>\u6765\u8ba1\u7b97\u7acb\u65b9\u6839\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\u6c42n\u7684\u5e38\u89c1\u65b9\u6cd5\u6709\u4ee5\u4e0b\u51e0\u79cd\uff1a\u4f7f\u7528\u5faa\u73af\u3001\u9012\u5f52\u3001\u6570\u5b66\u516c\u5f0f\u3002\u5728\u5176\u4e2d\uff0c\u4f7f\u7528\u6570\u5b66\u516c\u5f0f\u901a\u5e38\u662f\u6700\u6709\u6548\u7684\u65b9\u6cd5\uff0c\u56e0 […]","protected":false},"author":3,"featured_media":935498,"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\/935495"}],"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=935495"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/935495\/revisions"}],"predecessor-version":[{"id":935499,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/935495\/revisions\/935499"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/935498"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=935495"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=935495"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=935495"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}