{"id":2044,"date":"2025-02-25T22:56:18","date_gmt":"2025-02-25T14:56:18","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2044"},"modified":"2025-02-25T22:56:18","modified_gmt":"2025-02-25T14:56:18","slug":"javascript-while-%e5%be%aa%e7%8e%af","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/02\/25\/javascript-while-%e5%be%aa%e7%8e%af\/","title":{"rendered":"JavaScript\u00a0while \u5faa\u73af"},"content":{"rendered":"\n

\u4e00\u3001JavaScript while<\/code> \u5faa\u73af<\/strong><\/h3>\n\n\n\n

while<\/code> \u5faa\u73af\u662f JavaScript \u4e2d\u7684\u4e00\u79cd\u63a7\u5236\u6d41\u8bed\u53e5\uff0c\u7528\u4e8e\u5728\u6307\u5b9a\u6761\u4ef6\u4e3a true<\/code> \u65f6\uff0c\u91cd\u590d\u6267\u884c\u4e00\u6bb5\u4ee3\u7801\u3002\u5f53\u6761\u4ef6\u4e0d\u518d\u6ee1\u8db3\u65f6\uff0c\u5faa\u73af\u4f1a\u505c\u6b62\u3002<\/p>\n\n\n\n

\u57fa\u672c\u8bed\u6cd5<\/strong><\/h4>\n\n\n\n
while (condition) {\n    \/\/ \u5faa\u73af\u4f53\uff0c\u6267\u884c\u7684\u4ee3\u7801\n}<\/code><\/pre>\n\n\n\n
    \n
  • condition<\/code>\uff1a\u5faa\u73af\u6761\u4ef6\uff0c\u8868\u793a\u6bcf\u6b21\u5faa\u73af\u524d\u9700\u8981\u68c0\u67e5\u7684\u6761\u4ef6\u3002\u53ea\u8981\u6761\u4ef6\u4e3a true<\/code>\uff0c\u5faa\u73af\u4f1a\u7ee7\u7eed\u6267\u884c\uff1b\u4e00\u65e6\u6761\u4ef6\u4e3a false<\/code>\uff0c\u5faa\u73af\u505c\u6b62\u3002<\/li>\n<\/ul>\n\n\n\n
    \u793a\u4f8b\uff1a\u57fa\u672c\u7684 while<\/code> \u5faa\u73af<\/strong><\/h4>\n\n\n\n
    let i = 0;\nwhile (i < 5) {\n    console.log(i);\n    i++;\n}<\/code><\/pre>\n\n\n\n
    \u8f93\u51fa\uff1a<\/p>\n\n\n\n
    0\n1\n2\n3\n4<\/code><\/pre>\n\n\n\n
    \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0ci<\/code> \u4ece 0 \u5f00\u59cb\uff0c\u6bcf\u6b21\u5faa\u73af i<\/code> \u81ea\u589e 1\uff0c\u76f4\u5230 i<\/code> \u4e0d\u518d\u5c0f\u4e8e 5 \u65f6\u505c\u6b62\u5faa\u73af\u3002<\/p>\n\n\n\n
    \u5faa\u73af\u6d41\u7a0b\u5206\u6790<\/strong><\/h4>\n\n\n\n
      \n
    1. \u521d\u59cb\u5316\u53d8\u91cf i = 0<\/code>\u3002<\/li>\n\n\n\n
    2. \u6bcf\u6b21\u6267\u884c\u524d\u68c0\u67e5 i < 5<\/code> \u662f\u5426\u4e3a true<\/code>\u3002\u53ea\u8981\u4e3a true<\/code>\uff0c\u5c31\u7ee7\u7eed\u6267\u884c\u5faa\u73af\u4f53\u3002<\/li>\n\n\n\n
    3. \u6bcf\u6b21\u6267\u884c\u5faa\u73af\u4f53\u65f6\uff0ci<\/code> \u7684\u503c\u4f1a\u589e\u52a0 1\u3002<\/li>\n\n\n\n
    4. \u5f53 i<\/code> \u7b49\u4e8e 5 \u65f6\uff0ci < 5<\/code> \u7684\u6761\u4ef6\u4e0d\u518d\u6210\u7acb\uff0c\u5faa\u73af\u7ed3\u675f\u3002<\/li>\n<\/ol>\n\n\n\n
      \n\n\n\n
      \u4e8c\u3001while<\/code> \u5faa\u73af\u7684\u5176\u4ed6\u5e94\u7528<\/strong><\/h3>\n\n\n\n
      \u65e0\u9650\u5faa\u73af<\/strong><\/h4>\n\n\n\n
      \u5982\u679c\u5faa\u73af\u6761\u4ef6\u59cb\u7ec8\u4e3a true<\/code>\uff0c\u90a3\u4e48 while<\/code> \u5faa\u73af\u5c06\u4f1a\u53d8\u6210\u4e00\u4e2a\u65e0\u9650\u5faa\u73af\u3002\u8fd9\u901a\u5e38\u7528\u4e8e\u7b49\u5f85\u67d0\u4e2a\u6761\u4ef6\u53d8\u5316\u6216\u54cd\u5e94\u4e8b\u4ef6\u65f6\u3002<\/p>\n\n\n\n
      let count = 0;\nwhile (true) {\n    console.log(\"\u8fd9\u662f\u7b2c \" + count + \" \u6b21\");\n    count++;\n    if (count === 5) {\n        break;  \/\/ \u5f53 count \u8fbe\u5230 5 \u65f6\uff0c\u9000\u51fa\u5faa\u73af\n    }\n}<\/code><\/pre>\n\n\n\n
      \u8f93\u51fa\uff1a<\/p>\n\n\n\n
      \u8fd9\u662f\u7b2c 0 \u6b21\n\u8fd9\u662f\u7b2c 1 \u6b21\n\u8fd9\u662f\u7b2c 2 \u6b21\n\u8fd9\u662f\u7b2c 3 \u6b21\n\u8fd9\u662f\u7b2c 4 \u6b21<\/code><\/pre>\n\n\n\n
      \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cwhile (true)<\/code> \u4f1a\u5bfc\u81f4\u4e00\u4e2a\u65e0\u9650\u5faa\u73af\uff0c\u4f46\u901a\u8fc7 if<\/code> \u8bed\u53e5\u5224\u65ad count<\/code> \u662f\u5426\u7b49\u4e8e 5\uff0c\u5f53\u6ee1\u8db3\u6761\u4ef6\u65f6\uff0c\u7528 break<\/code> \u8bed\u53e5\u9000\u51fa\u5faa\u73af\u3002<\/p>\n\n\n\n
      while<\/code> \u5faa\u73af\u904d\u5386\u6570\u7ec4<\/strong><\/h4>\n\n\n\n
      while<\/code> \u5faa\u73af\u4e5f\u53ef\u4ee5\u7528\u6765\u904d\u5386\u6570\u7ec4\u3002\u901a\u8fc7\u624b\u52a8\u7ba1\u7406\u7d22\u5f15\u6765\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20\u3002<\/p>\n\n\n\n
      let fruits = [\"apple\", \"banana\", \"cherry\"];\nlet i = 0;\n\nwhile (i < fruits.length) {\n    console.log(fruits[i]);\n    i++;\n}<\/code><\/pre>\n\n\n\n
      \u8f93\u51fa\uff1a<\/p>\n\n\n\n
      apple\nbanana\ncherry<\/code><\/pre>\n\n\n\n
      \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u901a\u8fc7 i<\/code> \u6765\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\uff0c\u5e76\u4e14\u6bcf\u6b21\u5faa\u73af i<\/code> \u90fd\u4f1a\u81ea\u589e\u3002<\/p>\n\n\n\n
      \n\n\n\n
      \u4e09\u3001\u4e0e for<\/code> \u5faa\u73af\u7684\u5bf9\u6bd4<\/strong><\/h3>\n\n\n\n
        \n
      • for<\/code> \u5faa\u73af<\/strong>\u901a\u5e38\u7528\u4e8e\u5f53\u6211\u4eec\u77e5\u9053\u5faa\u73af\u6b21\u6570\u65f6\uff0c\u6216\u8005\u9700\u8981\u901a\u8fc7\u7d22\u5f15\u8bbf\u95ee\u5143\u7d20\u65f6\u3002<\/li>\n\n\n\n
      • while<\/code> \u5faa\u73af<\/strong>\u66f4\u9002\u7528\u4e8e\u5faa\u73af\u6b21\u6570\u4e0d\u56fa\u5b9a\uff0c\u76f4\u5230\u67d0\u4e2a\u6761\u4ef6\u6ee1\u8db3\u4e3a\u6b62\u7684\u60c5\u51b5\u3002\u5b83\u7684\u5faa\u73af\u6761\u4ef6\u53ef\u4ee5\u662f\u4efb\u4f55\u8868\u8fbe\u5f0f\uff0c\u901a\u5e38\u7528\u4e8e\u7b49\u5f85\u67d0\u4e2a\u4e8b\u4ef6\u53d1\u751f\u6216\u76f4\u5230\u67d0\u4e2a\u72b6\u6001\u6539\u53d8\u3002<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n
        \u603b\u7ed3<\/strong><\/h3>\n\n\n\n
          \n
        • while<\/code> \u5faa\u73af\u9002\u7528\u4e8e\u5f53\u5faa\u73af\u7684\u6b21\u6570\u4e0d\u56fa\u5b9a\uff0c\u76f4\u5230\u67d0\u4e2a\u6761\u4ef6\u4e0d\u518d\u6ee1\u8db3\u65f6\u624d\u9000\u51fa\u7684\u60c5\u51b5\u3002<\/li>\n\n\n\n
        • \u5faa\u73af\u6761\u4ef6\u5fc5\u987b\u786e\u4fdd\u6700\u7ec8\u4f1a\u53d8\u6210 false<\/code>\uff0c\u5426\u5219\u4f1a\u9020\u6210\u65e0\u9650\u5faa\u73af\u3002<\/li>\n\n\n\n
        • while<\/code> \u5faa\u73af\u5728\u5904\u7406\u52a8\u6001\u6761\u4ef6\u6216\u8005\u672a\u77e5\u5faa\u73af\u6b21\u6570\u65f6\u975e\u5e38\u6709\u7528\u3002<\/li>\n<\/ul>\n\n\n\n
          \u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
          \u4e00\u3001JavaScript while \u5faa\u73af while \u5faa\u73af\u662f JavaScript \u4e2d\u7684\u4e00\u79cd\u63a7\u5236\u6d41\u8bed\u53e5\uff0c\u7528\u4e8e […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[],"class_list":["post-2044","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2044","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2044"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2044\/revisions"}],"predecessor-version":[{"id":2045,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2044\/revisions\/2045"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2044"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2044"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2044"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}