{"id":7127,"date":"2024-04-14T12:01:01","date_gmt":"2024-04-14T04:01:01","guid":{"rendered":""},"modified":"2024-04-14T12:01:01","modified_gmt":"2024-04-14T04:01:01","slug":"JavaScript \u8fd0\u7b97\u7b26","status":"publish","type":"post","link":"https:\/\/mushiming.com\/7127.html","title":{"rendered":"JavaScript \u8fd0\u7b97\u7b26"},"content":{"rendered":"<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"display: none;\"> \n <path stroke-linecap=\"round\" d=\"M5,0 0,2.5 5,5z\" id=\"raphael-marker-block\" style=\"-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"><\/path> \n<\/svg> <\/p>\n<h2 id=\"\u8fd0\u7b97\u7b26\">\u8fd0\u7b97\u7b26<\/h2>\n<h4 id=\"1\u8fd0\u7b97\u64cd\u4f5c\u7b26\">1.\u8fd0\u7b97\u64cd\u4f5c\u7b26<\/h4>\n<ul>\n<li>\u201c+\u201d <br \/> \n<ul>\n<li>\u6570\u5b57\u8fd0\u7b97\u3001\u5b57\u7b26\u4e32\u94fe\u63a5<\/li>\n<li>\u4efb\u4f55\u6570\u636e\u7c7b\u578b\u52a0\u5b57\u7b26\u4e32\u90fd\u7b49\u4e8e\u5b57\u7b26\u4e32 <br \/> \u4f8b\u9898\uff1a var a = \u201ca\u201d+1+1 \/\/a11 <br \/> var a = 1+1+\u201ca\u201d+1+1 \/\/2a11 <br \/> var a = 1+\u201ca\u201d+1+1 \/\/1a11 \uff08\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4e0d\u4e3a1a2\uff0c\u56e0\u4e3a\u662f\u81ea\u5de6\u5411\u53f3\u76f8\u52a0\u7684\uff09<\/li>\n<\/ul>\n<\/li>\n<li>\u201c-\u201d\uff0c\u201c*\u201d\uff0c\u201c\/\u201d\uff0c\u201c%\u201d\u53d6\u4f59\uff0c\u201c=\u201d\uff0c\u201c0\u201d <br \/> \u4f8b\u9898\uff1a\u51e0\u4e2a\u7279\u6b8a\u503c: <br \/> \n<ul>\n<li>0\/0=NaN <\/li>\n<li>1\/0=Infinity<\/li>\n<li>\u7b97Number \u6570\u5b57\u7c7b\u578b<\/li>\n<li>-1\/0=-Infinity<\/li>\n<\/ul>\n<\/li>\n<li>\u201c=\u201d\u4f18\u5148\u7ea7\u6700\u5f31\uff0c\u201c\uff08\uff09\u201d\u4f18\u5148\u7ea7\u8f83\u9ad8<\/li>\n<li>\u201c++\u201d\uff0c\u201c- -\u201d\uff0c\u201c+=\u201d\uff0c\u201c\/=\u201d\uff0c\u201c*=\u201d\uff0c\u201c%=\u201d <br \/> \u4f8b\u98981\uff1a<\/li>\n<\/ul>\n<pre class=\"prettyprint\"><code class=\" hljs livecodeserver\">var <span class=\"hljs-operator\">a<\/span> = <span class=\"hljs-number\">10<\/span>\uff1b\n      Document.<span class=\"hljs-built_in\">write<\/span>\uff08<span class=\"hljs-operator\">a<\/span>++\uff09\uff1b<span class=\"hljs-comment\"> \/\/10<\/span><\/code><\/pre>\n<pre class=\"language-java prettyprint linenums\"><code>    \u8868\u793a\u5148\u6267\u884c\u8bed\u53e5\uff0c\u540e\u52a0\u52a0\uff08\u5148\u6253\u5370a\uff0c\u518d\u7ed9a++\uff0c\u4f46\u6b64\u65f6\u8bed\u53e5\u5df2\u7ecf\u7ed3\u675f\uff0ca\u6ca1\u6709\u6253\u5370\u51fa\u6765\uff09\u3002 \n<\/code><\/pre>\n<p>\u4f8b\u98982\uff1a<\/p>\n<pre class=\"prettyprint\"><code class=\" hljs autohotkey\">var <span class=\"hljs-literal\">a<\/span> = <span class=\"hljs-number\">10<\/span><span class=\"hljs-comment\">;<\/span>\n      var b = ++<span class=\"hljs-literal\">a<\/span> -<span class=\"hljs-number\">1<\/span> + <span class=\"hljs-literal\">a<\/span>++<span class=\"hljs-comment\">;<\/span>\n          document.write(b +<span class=\"hljs-string\">\" \"<\/span>+<span class=\"hljs-literal\">a<\/span>)<span class=\"hljs-comment\">;<\/span>\n\/\/<span class=\"hljs-number\">21<\/span><\/code><\/pre>\n<p>\u4f8b\u98983\uff1a<\/p>\n<pre class=\"prettyprint\"><code class=\" hljs delphi\"><span class=\"hljs-keyword\">var<\/span> a = <span class=\"hljs-number\">1<\/span>\uff1b\n<span class=\"hljs-keyword\">var<\/span> b =a ++ +<span class=\"hljs-number\">1<\/span>;\ndocument.<span class=\"hljs-keyword\">write<\/span>\uff08a\uff09\uff1b\ndocument.<span class=\"hljs-keyword\">write<\/span>\uff08b\uff09\uff1b\n<span class=\"hljs-comment\">\/\/2 2<\/span><\/code><\/pre>\n<pre class=\"language-java prettyprint linenums\"><code>    \u56e0\u4e3a\u5f0f\u5b50\u91cc\u662fa++\uff08++\u5728\u540e\u9762\uff09\uff0c\u6240\u4ee5\u5148\u7b97\u6574\u4e2a\u5f0f\u5b50\uff0c\u5168\u90e8\u7b97\u5b8c\u518d\u7ed9a++\u3002\n<\/code><\/pre>\n<p>\u53d8\u5f62\uff1a<\/p>\n<pre class=\"prettyprint\"><code class=\" hljs delphi\"><span class=\"hljs-keyword\">var<\/span> a = <span class=\"hljs-number\">1<\/span>\uff1b\n<span class=\"hljs-keyword\">var<\/span> b = ++a +<span class=\"hljs-number\">1<\/span>;\ndocument.<span class=\"hljs-keyword\">write<\/span>\uff08a\uff09\uff1b\ndocument.<span class=\"hljs-keyword\">write<\/span>\uff08b\uff09\uff1b\n<span class=\"hljs-comment\">\/\/2 3<\/span><\/code><\/pre>\n<p>\u4f8b\u98984\uff1a<\/p>\n<pre class=\"prettyprint\"><code class=\" hljs livecodeserver\">var <span class=\"hljs-operator\">a<\/span> = <span class=\"hljs-number\">1<\/span>\uff1b\nvar b = <span class=\"hljs-operator\">a<\/span><span class=\"hljs-comment\">-- + --a;<\/span>\ndocument.<span class=\"hljs-built_in\">write<\/span>\uff08<span class=\"hljs-operator\">a<\/span>\uff09\uff1b\ndocument.<span class=\"hljs-built_in\">write<\/span>\uff08b\uff09\uff1b<span class=\"hljs-comment\"> \/\/-1 0<\/span><\/code><\/pre>\n<blockquote>\n<p>\u89c2\u5bdf\u6574\u4e2a\u5f0f\u5b50\uff0c\u56e0\u4e3a\u5f0f\u5b50\u91cc\u6709\u2013a\uff0c\u6240\u4ee5\u9996\u5148\u7b97\u4ed6\uff08++a\u540c\u7406\uff09\uff0c\u2013a=0\uff0ca=0\uff0c\u6b64\u65f6\u524d\u9762\u7684a\u2013\u4e2d\u7684a\u4e5f\u53d8\u6210\u4e860\uff0c\u6240\u4ee5b\u7684\u503c\u4e3a0\uff0c\u6700\u540e\u7b97a\u2013\uff0c\u6240\u4ee5a\u7684\u503c\u4e3a-1.<\/p>\n<\/blockquote>\n<h4 id=\"2\u6bd4\u8f83\u8fd0\u7b97\u7b26\">2.\u6bd4\u8f83\u8fd0\u7b97\u7b26<\/h4>\n<ul>\n<li>\u201c&gt;\u201d\uff0c\u201c&lt;\u201d\uff0c\u201c==\u201d\u662f\u5426\u7b49\u4e8e\uff0c\u201c&gt;=\u201d\uff0c\u201c&lt;=\u201d\uff0c\u201c!=\u201d\u662f\u5426\u4e0d\u7b49\u4e8e <br \/> \u6bd4\u8f83\u7ed3\u679c\u4e3aboolean<\/li>\n<\/ul>\n<h4 id=\"3\u903b\u8f91\u8fd0\u7b97\u7b26\">3.\u903b\u8f91\u8fd0\u7b97\u7b26<\/h4>\n<p>\u201c&amp;&amp;\u201d\uff0c\u201c||\u201d\uff0c\u201c\uff01\u201d <br \/> \u8fd0\u7b97\u7ed3\u679c\u4e3a\u771f\u5b9e\u7684\u503c<\/p>\n<h4 id=\"\u5168\u771f\u624d\u4e3a\u771f\">\u201c&amp;&amp;\u201d\uff08\u5168\u771f\u624d\u4e3a\u771f\uff09<\/h4>\n<blockquote>\n<p>\u8fd0\u7b97\u89c4\u5219\uff1a\u5148\u770b\u7b2c\u4e00\u4e2a\u8868\u8fbe\u5f0f\u8f6c\u6362\u6210\u5e03\u5c14\u503c\u5f97\u7ed3\u679c\uff0c\u5982\u679c\u7ed3\u679c\u4e3a\u771f\uff084\u4e2d\u5217\u51fa\u4e86\u6240\u6709\u4e3a\u5047\u7684\u503c\uff09\uff0c\u90a3\u4e48\u5b83\u4f1a\u770b\u7b2c\u4e8c\u4e2a\u8868\u8fbe\u5f0f\u8f6c\u6362\u4e3a\u5e03\u5c14\u503c\u7684\u7ed3\u679c\uff0c\u7136\u540e\u5982\u679c\u503c\u6709\u4e24\u4e2a\u8868\u8fbe\u5f0f\u7684\u8bdd\uff0c\u53ea\u8981\u770b\u5230\u7b2c\u4e8c\u4e2a\u8868\u8fbe\u65f6\u5c31\u53ef\u4ee5\u8fd4\u56de\u8be5\u8868\u8fbe\u5f0f\u7684\u503c\u4e86\u3002<\/p>\n<\/blockquote>\n<p>\u4f8b\u9898\uff1a<\/p>\n<pre class=\"prettyprint\"><code class=\" hljs livecodeserver\">var <span class=\"hljs-operator\">a<\/span> = <span class=\"hljs-number\">1<\/span> &amp;&amp; <span class=\"hljs-number\">2<\/span> \uff1b\ndocument.<span class=\"hljs-built_in\">write<\/span>\uff08<span class=\"hljs-operator\">a<\/span>\uff09\uff1b\n\u7ed3\u679c\uff1a<span class=\"hljs-number\">2<\/span><\/code><\/pre>\n<pre class=\"prettyprint\"><code class=\" hljs livecodeserver\">var <span class=\"hljs-operator\">a<\/span> = <span class=\"hljs-number\">1<\/span> &amp;&amp; <span class=\"hljs-number\">2<\/span> + <span class=\"hljs-number\">2<\/span>\uff1b\ndocument.<span class=\"hljs-built_in\">write<\/span>\uff08<span class=\"hljs-operator\">a<\/span>\uff09\uff1b\n\u7ed3\u679c\uff1a<span class=\"hljs-number\">4<\/span><\/code><\/pre>\n<pre class=\"prettyprint\"><code class=\" hljs livecodeserver\">var <span class=\"hljs-operator\">a<\/span> = <span class=\"hljs-number\">0<\/span> &amp;&amp; <span class=\"hljs-number\">2<\/span> + <span class=\"hljs-number\">2<\/span>\uff1b\ndocument.<span class=\"hljs-built_in\">write<\/span>\uff08<span class=\"hljs-operator\">a<\/span>\uff09\uff1b\n\u7ed3\u679c\uff1a<span class=\"hljs-constant\">false<\/span><\/code><\/pre>\n<pre class=\"prettyprint\"><code class=\" hljs livecodeserver\">var <span class=\"hljs-operator\">a<\/span> = <span class=\"hljs-number\">1<\/span> &amp;&amp; <span class=\"hljs-number\">0<\/span>  &amp;&amp; <span class=\"hljs-number\">3<\/span>\uff1b\ndocument.<span class=\"hljs-built_in\">write<\/span>\uff08<span class=\"hljs-operator\">a<\/span>\uff09\uff1b\n\u7ed3\u679c\uff1a<span class=\"hljs-constant\">false<\/span>\uff0c\u4ece\u5de6\u5411\u53f3\u4f9d\u6b21\u5224\u65ad\uff0c\u5f53\u503c\u4e3a<span class=\"hljs-number\">0<\/span>\u65f6\u8fd4\u56de<span class=\"hljs-number\">0<\/span>\u518d\u8f6c\u6362\u6210\u5e03\u5c14\u503c\uff0c\u5219\u4e3a<span class=\"hljs-constant\">false<\/span>\u3002<\/code><\/pre>\n<pre class=\"prettyprint\"><code class=\" hljs livecodeserver\">var <span class=\"hljs-operator\">a<\/span> = <span class=\"hljs-number\">1<\/span> + <span class=\"hljs-number\">1<\/span> &amp;&amp; <span class=\"hljs-number\">1<\/span> - <span class=\"hljs-number\">1<\/span>\uff1b\ndocument.<span class=\"hljs-built_in\">write<\/span>\uff08<span class=\"hljs-operator\">a<\/span>\uff09\uff1b\n\u7ed3\u679c\uff1a<span class=\"hljs-number\">0<\/span><\/code><\/pre>\n<h4 id=\"\u6216\u5168\u5047\u624d\u4e3a\u5047\">\u201c||\u201d\u6216\uff08\u5168\u5047\u624d\u4e3a\u5047\uff09<\/h4>\n<blockquote>\n<p>\u8fd0\u7b97\u89c4\u5219\uff1a\u5148\u770b\u7b2c\u4e00\u4e2a\u662f\u5426\u4e3a\u771f\uff0c\u82e5\u4e3a\u771f\uff0c\u5219\u4e0d\u518d\u5f80\u4e0b\u770b\u4e86\uff0c\u8fd4\u56de\u8fd9\u4e2a\u6570\u7684\u5e03\u5c14\u503c\uff0c\u82e5\u4e0d\u4e3a\u771f\uff0c\u5219\u7ee7\u7eed\u81ea\u5de6\u5411\u53f3\uff0c\u76f4\u5230\u627e\u5230\u771f\u7684\u4e3a\u6b62\u3002<\/p>\n<\/blockquote>\n<pre class=\"prettyprint\"><code class=\" hljs livecodeserver\"> \u4f8b\u9898\uff1avar <span class=\"hljs-operator\">a<\/span> = <span class=\"hljs-number\">1<\/span> || <span class=\"hljs-number\">2<\/span> \uff1b\ndocument.<span class=\"hljs-built_in\">write<\/span>\uff08<span class=\"hljs-operator\">a<\/span>\uff09\uff1b\n\u7ed3\u679c\uff1a<span class=\"hljs-number\">1<\/span><\/code><\/pre>\n<pre class=\"prettyprint\"><code class=\" hljs livecodeserver\">\u4f8b\u9898\uff1avar <span class=\"hljs-operator\">a<\/span> = <span class=\"hljs-number\">0<\/span> || <span class=\"hljs-number\">3<\/span> \uff1b\ndocument.<span class=\"hljs-built_in\">write<\/span>\uff08<span class=\"hljs-operator\">a<\/span>\uff09\uff1b\n\u7ed3\u679c\uff1a<span class=\"hljs-number\">3<\/span><\/code><\/pre>\n<pre class=\"prettyprint\"><code class=\" hljs livecodeserver\">\u4f8b\u9898\uff1avar <span class=\"hljs-operator\">a<\/span> = <span class=\"hljs-number\">0<\/span> || <span class=\"hljs-number\">0<\/span> \uff1b\ndocument.<span class=\"hljs-built_in\">write<\/span>\uff08<span class=\"hljs-operator\">a<\/span>\uff09\uff1b\n\u7ed3\u679c\uff1a<span class=\"hljs-constant\">false<\/span><\/code><\/pre>\n<h4 id=\"\u975e\">\u201c\uff01\u201d \u975e<\/h4>\n<h4 id=\"4\u88ab\u8ba4\u5b9a\u4e3afalse\u7684\u503c\u4e94\u4e2a\">4.\u88ab\u8ba4\u5b9a\u4e3afalse\u7684\u503c\uff08\u4e94\u4e2a\uff09<\/h4>\n<p>undefined\uff0cnull\uff0cNaN\uff0c\u201c\u201d\uff0c0\uff0cfalse<\/p>\n<h4 id=\"5\u5b57\u7b26\u4e32\u6bd4\u8f83\u65f6\u5148\u540c\u65f6\u6bd4\u8f83\u7b2c\u4e00\u4e2a\">5.\u5b57\u7b26\u4e32\u6bd4\u8f83\u65f6\u5148\u540c\u65f6\u6bd4\u8f83\u7b2c\u4e00\u4e2a<\/h4>\n<p>\u4f8b\u9898\uff1a var a = \u201c10\u201d&gt;\u201c8\u201d\uff1b <br \/> document.write\uff08a\uff09\uff1b <br \/> \u7ed3\u679c\uff1afalse<\/p>\n<blockquote>\n<p>\u56e0\u4e3a\u5148\u6bd4\u8f83\u7b2c\u4e00\u4e2a\u5b57\u6bcd\uff0c1\u548c8\u7684ascll\u7801\u3002<\/p>\n<\/blockquote>\n<p>\u5229\u7528\u8bed\u8a00\u6765\u89e3\u51b3\u95ee\u9898\uff1a <br \/> \u4f8b\u98981\uff1a\u8ba1\u7b972\u7684n\u6b21\u5e42\uff0cn\u53ef\u8f93\u5165\uff0cn\u4e3a\u81ea\u7136\u6570\u3002<\/p>\n<pre class=\"prettyprint\"><code class=\" hljs xml\"><span class=\"hljs-tag\">&lt;<span class=\"hljs-title\">script<\/span> <span class=\"hljs-attribute\">type<\/span>=<span class=\"hljs-value\">\u201dtext<\/span>\/<span class=\"hljs-attribute\">javascript<\/span>\u201d&gt;<\/span><span class=\"javascript\"> <span class=\"hljs-keyword\">var<\/span> n = perseInt(window.prompt(\u2018input\u2019)); <span class=\"hljs-keyword\">var<\/span> mul = <span class=\"hljs-number\">1<\/span>; <span class=\"hljs-keyword\">for<\/span>(<span class=\"hljs-keyword\">var<\/span> i = <span class=\"hljs-number\">0<\/span>; i&lt;n ; i++){ mul *= <span class=\"hljs-number\">2<\/span>; } document.write(mul); <\/span><span class=\"hljs-tag\">&lt;\/<span class=\"hljs-title\">script<\/span>&gt;<\/span><\/code><\/pre>\n<p>\u4f8b\u98982\uff1a\u8ba1\u7b97n\u7684\u9636\u4e58\uff0cn\u53ef\u8f93\u5165\u3002<\/p>\n<pre class=\"prettyprint\"><code class=\" hljs xml\"><span class=\"hljs-tag\">&lt;<span class=\"hljs-title\">script<\/span> <span class=\"hljs-attribute\">type<\/span>=<span class=\"hljs-value\">\u201dtext<\/span>\/<span class=\"hljs-attribute\">javascript<\/span>\u201d&gt;<\/span><span class=\"javascript\"> <span class=\"hljs-keyword\">var<\/span> n = perseInt(window.prompt(\u2018input\u2019)); <span class=\"hljs-keyword\">var<\/span> mul = <span class=\"hljs-number\">1<\/span>; <span class=\"hljs-keyword\">for<\/span>(<span class=\"hljs-keyword\">var<\/span> i = <span class=\"hljs-number\">0<\/span>; i&lt;=n ; i++){ mul *= i; } document.write(mul); <\/span><span class=\"hljs-tag\">&lt;\/<span class=\"hljs-title\">script<\/span>&gt;<\/span><\/code><\/pre>\n<p>\u4f8b\u98983\uff1a\u8457\u540d\u7684\u6590\u6ce2\u90a3\u5951\u6570\u5217\uff0c\u8f93\u51fa\u7b2cn\u9879\u3002<\/p>\n<pre class=\"prettyprint\"><code class=\" hljs applescript\"> &lt;<span class=\"hljs-keyword\">script<\/span> type=\u201d<span class=\"hljs-type\">text<\/span>\/javascript\u201d&gt;\n<span class=\"hljs-keyword\">if<\/span>\uff08n&gt;<span class=\"hljs-number\">2<\/span>\uff09{\nvar n = perseInt(window.prompt(\u2018input\u2019));\nvar <span class=\"hljs-keyword\">first<\/span> = <span class=\"hljs-number\">1<\/span>,\n<span class=\"hljs-keyword\">second<\/span> = <span class=\"hljs-number\">1<\/span>,\n<span class=\"hljs-keyword\">third<\/span>;\n\n<span class=\"hljs-keyword\">for<\/span>(var i = <span class=\"hljs-number\">0<\/span>; i&lt;n-<span class=\"hljs-number\">2<\/span> ;  i++){\n<span class=\"hljs-keyword\">third<\/span> = <span class=\"hljs-keyword\">first<\/span>+<span class=\"hljs-keyword\">second<\/span>;\n<span class=\"hljs-keyword\">first<\/span> = <span class=\"hljs-keyword\">second<\/span>;\n<span class=\"hljs-keyword\">second<\/span>=<span class=\"hljs-keyword\">third<\/span>;\n}\ndocument.<span class=\"hljs-command\">write<\/span>(<span class=\"hljs-keyword\">third<\/span>);\n}\n<span class=\"hljs-keyword\">else<\/span>{\nDocument.<span class=\"hljs-command\">write<\/span>(<span class=\"hljs-number\">1<\/span>);\n} \n&lt;\/<span class=\"hljs-keyword\">script<\/span>&gt;<\/code><\/pre>\n<pre class=\"language-java prettyprint linenums\"><code>\u5206\u6790\uff1a\/\/ f   s   t\n     \/\/  1   1   2   3   5   8\n     \/\/      f   s   t\n     \u4f9d\u6b21\u987a\u4f4d\u5f80\u540e\u79fb\n<\/code><\/pre>\n<p>\u4f8b\u98984\uff1a\u8f93\u5165a\uff0cb\uff0cc\u4e09\u4e2a\u6570\u5b57\uff0c\u6253\u5370\u51fa\u6700\u5927\u7684\u3002<\/p>\n<pre class=\"prettyprint\"><code class=\" hljs coffeescript\">&lt;script type=\u201dtext\/javascript\u201d&gt;\n<span class=\"hljs-reserved\">var<\/span> a = perseInt(<span class=\"hljs-built_in\">window<\/span>.prompt(\u2018input\u2019));\n<span class=\"hljs-reserved\">var<\/span> b = perseInt(<span class=\"hljs-built_in\">window<\/span>.prompt(\u2018input\u2019));\n<span class=\"hljs-reserved\">var<\/span> c = perseInt(<span class=\"hljs-built_in\">window<\/span>.prompt(\u2018input\u2019));\n<span class=\"hljs-keyword\">if<\/span>(a&gt;b) {\n        <span class=\"hljs-keyword\">if<\/span>(a&gt;c) {\n<span class=\"hljs-built_in\">document<\/span>.write(a); \n} <span class=\"hljs-keyword\">else<\/span> {\n<span class=\"hljs-built_in\">document<\/span>.write(c);\n}<span class=\"hljs-keyword\">else<\/span>{\n<span class=\"hljs-keyword\">if<\/span> \uff08b&gt;c\uff09{\n<span class=\"hljs-built_in\">document<\/span>.write(b);\n} <span class=\"hljs-keyword\">else<\/span> {\n    <span class=\"hljs-built_in\">document<\/span>.write(c);\n}\n}  \n&lt;\/script&gt;<\/code><\/pre>\n<p>\u4f8b\u98985:\u6253\u5370\u51fa100\u4ee5\u5185\u7684\u8d28\u6570\u3002<\/p>\n<pre class=\"prettyprint\"><code class=\" hljs xml\"><span class=\"hljs-tag\">&lt;<span class=\"hljs-title\">script<\/span> <span class=\"hljs-attribute\">type<\/span>=<span class=\"hljs-value\">\u201dtext<\/span>\/<span class=\"hljs-attribute\">javascript<\/span>\u201d&gt;<\/span><span class=\"javascript\"> <span class=\"hljs-keyword\">var<\/span> count = <span class=\"hljs-number\">0<\/span>; <span class=\"hljs-keyword\">for<\/span>(<span class=\"hljs-keyword\">var<\/span> i = <span class=\"hljs-number\">1<\/span> ; i &lt; <span class=\"hljs-number\">100<\/span> ; i++){ <span class=\"hljs-keyword\">for<\/span>(<span class=\"hljs-keyword\">var<\/span> j = <span class=\"hljs-number\">1<\/span> ; j &lt;= i ; j++){ <span class=\"hljs-keyword\">if<\/span>(i % j == <span class=\"hljs-number\">0<\/span>){ count ++; } } <span class=\"hljs-keyword\">if<\/span>(count == <span class=\"hljs-number\">2<\/span>){ document.write(i+<span class=\"hljs-string\">\"\"<\/span>); } count = <span class=\"hljs-number\">0<\/span>; } <\/span><span class=\"hljs-tag\">&lt;\/<span class=\"hljs-title\">script<\/span>&gt;<\/span><\/code><\/pre>\n<blockquote>\n<p>\u4f18\u5316\uff1a\u5c06\u4ece1\u5230100\u6539\u4e3a\u4ece1\u523010\uff0c\u56e0\u4e3a100=10*10\uff0c\u4e00\u4e2a\u589e\u5927\uff0c\u53e6\u4e00\u4e2a\u5c31\u5f97\u51cf\u5c0f\uff0c\u6240\u4ee5\u5982\u679c\u9664\u523010\u90fd\u6ca1\u6709\u6570\u80fd\u628a100\u6574\u9664\u7684\u8bdd\uff0c\u90a310\u4ee5\u4e0a\u5c31\u66f4\u6ca1\u6709\u4e86\u3002<\/p>\n<\/blockquote>\n<p>\u4f18\u5316\u4ee3\u7801:<\/p>\n<pre class=\"prettyprint\"><code class=\" hljs xml\"><span class=\"hljs-tag\">&lt;<span class=\"hljs-title\">script<\/span> <span class=\"hljs-attribute\">type<\/span>=<span class=\"hljs-value\">\u201dtext<\/span>\/<span class=\"hljs-attribute\">javascript<\/span>\u201d&gt;<\/span><span class=\"javascript\"> <span class=\"hljs-keyword\">var<\/span> count = <span class=\"hljs-number\">0<\/span>; <span class=\"hljs-keyword\">for<\/span>(<span class=\"hljs-keyword\">var<\/span> i = <span class=\"hljs-number\">2<\/span> ; i&lt;<span class=\"hljs-number\">100<\/span> ; i++){ <span class=\"hljs-keyword\">for<\/span>(<span class=\"hljs-keyword\">var<\/span> j = <span class=\"hljs-number\">1<\/span> ; j&lt;=<span class=\"hljs-built_in\">Math<\/span>.sqrt(i) ; j++){ <span class=\"hljs-comment\">\/\/\u5f00\u6839\u53f7\u51fd\u6570<\/span> <span class=\"hljs-keyword\">if<\/span>(i % j == <span class=\"hljs-number\">0<\/span>){ count ++; } } <span class=\"hljs-keyword\">if<\/span>(count == <span class=\"hljs-number\">1<\/span>){ document.write(i+\u201d\u201d); } count = <span class=\"hljs-number\">0<\/span>; } <\/span><span class=\"hljs-tag\">&lt;\/<span class=\"hljs-title\">script<\/span>&gt;<\/span><\/code><\/pre>\n<p>\u4f8b\u98986\uff1a\u5224\u65ad\u4eca\u5929\u5468\u51e0\uff1a<\/p>\n<pre class=\"prettyprint\"><code class=\" hljs coffeescript\">&lt;script type=\u201dtext\/javascript\u201d&gt;\n<span class=\"hljs-reserved\">var<\/span> data = <span class=\"hljs-built_in\">window<\/span>.prompt\uff08\u2018input\u2019\uff09\uff1b \n<span class=\"hljs-keyword\">switch<\/span>\uff08data\uff09\uff5b\n<span class=\"hljs-reserved\">case<\/span> \u201dmonday\u201d\uff1a\n<span class=\"hljs-built_in\">console<\/span>.log(\u2018working\u2019);\n<span class=\"hljs-keyword\">break<\/span>;\n<span class=\"hljs-reserved\">case<\/span> \u201ctuesday\u201d\uff1a\n<span class=\"hljs-built_in\">console<\/span>.log(\u2018working\u2019);\n<span class=\"hljs-keyword\">break<\/span>;\n<span class=\"hljs-reserved\">case<\/span> \u201dwednesday\u201d\uff1a\n<span class=\"hljs-built_in\">console<\/span>.log(\u2018working\u2019);\n<span class=\"hljs-keyword\">break<\/span>;\n<span class=\"hljs-reserved\">case<\/span> \u201dthursday\u201d\uff1a\n<span class=\"hljs-built_in\">console<\/span>.log(\u2018working\u2019);\n<span class=\"hljs-keyword\">break<\/span>;\n<span class=\"hljs-reserved\">case<\/span> \u201dfriday\u201d\uff1a\n<span class=\"hljs-built_in\">console<\/span>.log(\u2018working\u2019);\n<span class=\"hljs-keyword\">break<\/span>;\n<span class=\"hljs-reserved\">case<\/span> \u201dsaturday\u201d\uff1a\n<span class=\"hljs-built_in\">console<\/span>.log(\u2018ralaxing\u2019);\n<span class=\"hljs-keyword\">break<\/span>;\n<span class=\"hljs-reserved\">case<\/span> \u201dsunday\u201d\uff1a\n<span class=\"hljs-built_in\">console<\/span>.log(\u2018ralaxing\u2019);\n<span class=\"hljs-keyword\">break<\/span>;\n\uff5d\n&lt;\/script&gt;<\/code><\/pre>\n<p>\u6b64\u65f6\u4ee3\u7801\u91cd\u590d\u8fc7\u591a\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528switch\u51fd\u6570\u7279\u6027\u6765\u7b80\u5316\u4ee3\u7801\uff1a<\/p>\n<pre class=\"language-java prettyprint linenums\"><code>switch\u51fd\u6570\u7279\u6027\uff1a\u5f53\u5728case\u91cc\u9762\u627e\u5230==data\u7684\u5173\u952e\u5b57\u65f6\uff0c\u4f1a\u4e00\u76f4\u5411\u4e0b\u6267\u884c\uff0c\u76f4\u5230\u9047\u89c1break\u3002   \n<\/code><\/pre>\n<pre class=\"prettyprint\"><code class=\" hljs xml\"><span class=\"hljs-tag\">&lt;<span class=\"hljs-title\">script<\/span> <span class=\"hljs-attribute\">type<\/span>=<span class=\"hljs-value\">\u201dtext<\/span>\/<span class=\"hljs-attribute\">javascript<\/span>\u201d&gt;<\/span><span class=\"javascript\"> <span class=\"hljs-keyword\">var<\/span> data = window.prompt\uff08\u2018input\u2019\uff09\uff1b <span class=\"hljs-keyword\">switch<\/span>\uff08data\uff09\uff5b <span class=\"hljs-keyword\">case<\/span> \u201dmonday\u201d; <span class=\"hljs-keyword\">case<\/span> \u201ctuesday\u201d; <span class=\"hljs-keyword\">case<\/span> \u201dwednesday\u201d; <span class=\"hljs-keyword\">case<\/span> \u201dthursday\u201d; <span class=\"hljs-keyword\">case<\/span> \u201dfriday\u201d; console.log(\u2018working\u2019); <span class=\"hljs-keyword\">break<\/span>; <span class=\"hljs-keyword\">case<\/span> \u201dsaturday\u201d; <span class=\"hljs-keyword\">case<\/span> \u201dsunday\u201d; console.log(\u2018ralaxing\u2019); <span class=\"hljs-keyword\">break<\/span>; \uff5d <\/span><span class=\"hljs-tag\">&lt;\/<span class=\"hljs-title\">script<\/span>&gt;<\/span><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"JavaScript 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