{"id":6301,"date":"2022-06-26T15:18:58","date_gmt":"2022-06-26T07:18:58","guid":{"rendered":"https:\/\/www.lilichao.com\/?p=6301"},"modified":"2022-10-14T15:42:32","modified_gmt":"2022-10-14T07:42:32","slug":"%e8%bf%90%e7%ae%97%e7%ac%a6","status":"publish","type":"post","link":"https:\/\/lilichao.com\/?p=6301","title":{"rendered":"\u8fd0\u7b97\u7b26"},"content":{"rendered":"\n<p>\u8fd0\u7b97\u7b26\u7528\u6765\u5bf9\u4e00\u4e2a\u6216\u591a\u4e2a\u503c\u8fdb\u884c\u8fd0\u7b97\u5e76\u8fd4\u56de\u8fd0\u7b97\u7ed3\u679c\u3002\u6bd4\u5982\uff0c+\u5c31\u662f\u4e00\u4e2a\u8fd0\u7b97\u7b26\uff0c\u7528\u6765\u6c42\u4e24\u4e2a\u6570\u7684\u548c\u3002<code>let a = 1 + 1<\/code>\uff0c\u53d8\u91cf\u7684a\u7684\u503c\u662f2\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b97\u672f\u8fd0\u7b97\u7b26<\/h2>\n\n\n\n<p>\u7b97\u672f\u8fd0\u7b97\u7b26\u7528\u6765\u5b8c\u6210\u7b97\u672f\u8fd0\u7b97\uff0c\u529f\u80fd\u548c\u6570\u5b66\u4e2d\u7684\u7b97\u672f\u8fd0\u7b97\u7b26\u529f\u80fd\u4e00\u81f4\u3002<\/p>\n\n\n\n<ul><li>+ \u7528\u4e8e\u6c42\u4e24\u4e2a\u6570\u7684\u548c<\/li><li>&#8211; \u7528\u4e8e\u6c42\u4e24\u4e2a\u6570\u7684\u5dee<\/li><li>* \u7528\u4e8e\u6c42\u4e24\u4e2a\u6570\u7684\u79ef<\/li><li>\/ \u7528\u4e8e\u6c42\u4e24\u4e2a\u6570\u7684\u5546<\/li><li>% \u6a21\u8fd0\u7b97\uff0c\u6c42\u4e24\u4e2a\u6570\u76f8\u9664\u7684\u4f59\u6570<\/li><li>** \u5e42\u8fd0\u7b97\uff0cx\u7684y\u6b21\u5e42\u8fd0<\/li><\/ul>\n\n\n\n<p>\u6ce8\u610f\uff1a\u5bf9\u4e8e\u975e\u6570\u503c\u8fdb\u884c\u7b97\u672f\u8fd0\u7b97\u65f6\u4f1a\u5148\u8f6c\u6362\u4e3a\u6570\u503c\u7136\u540e\u518d\u8fd0\u7b97\uff08\u5b57\u7b26\u4e32\u52a0\u6cd5\u9664\u5916\uff09\u3002\u548c\u5b57\u7b26\u4e32\u8fdb\u884c\u52a0\u6cd5\u8fd0\u7b97\u65f6\uff0c\u5176\u4ed6\u503c\u4f1a\u5148\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u7136\u540e\u518d\u8fd0\u7b97\u3002<\/p>\n\n\n\n<p>\u793a\u4f8b\uff1a<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-lang=\"JavaScript\"><code>1 + 1 \/\/ 2\ntrue + false \/\/1\n1 + &quot;1&quot; \/\/ &quot;11&quot;\n10 % 3 \/\/ 1\n2 ** 3 \/\/ 8<\/code><\/pre><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\u8d4b\u503c\u8fd0\u7b97\u7b26<\/h2>\n\n\n\n<ul><li>= \u7b49\u53f7<\/li><li>+= <code>a += b<\/code>\u7b49\u4ef7\u4e8e<code>a = a + b<\/code> <\/li><li>-= <code>a -= b<\/code>\u7b49\u4ef7\u4e8e<code>a = a - b<\/code> <\/li><li>*= <code>a *= b<\/code>\u7b49\u4ef7\u4e8e<code>a = a * b<\/code> <\/li><li>\/= <code>a \/= b<\/code>\u7b49\u4ef7\u4e8e<code>a = a \/ b<\/code> <\/li><li>%= <code>a %= b<\/code>\u7b49\u4ef7\u4e8e<code>a = a % b<\/code> <\/li><li>??= \u7a7a\u8d4b\u503c<\/li><\/ul>\n\n\n\n<p>\u6ce8\u610f\uff1a\u4f7f\u7528\u7a7a\u8d4b\u503c\u7b26\u53f7\u5bf9\u53d8\u91cf\u8fdb\u884c\u8d4b\u503c\u65f6\uff0c\u53ea\u6709\u53d8\u91cf\u7684\u503c\u4e3anull\u6216undefined\u65f6\u624d\u4f1a\u53d1\u751f\u8d4b\u503c<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u5143\u7684+\u548c-<\/h2>\n\n\n\n<ul><li>+ \u4e00\u5143\u7684\u52a0\uff0c\u6b63\u53f7<\/li><li>&#8211; \u4e00\u5143\u7684\u51cf\uff0c\u8d1f\u53f7<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u81ea\u589e\u548c\u81ea\u51cf<\/h2>\n\n\n\n<ul><li>++ \u81ea\u589e<\/li><li>&#8212; \u81ea\u51cf<\/li><\/ul>\n\n\n\n<p>\u6ce8\u610f\uff1a<\/p>\n\n\n\n<ul><li>\u81ea\u589e\u4f1a\u4f7f\u53d8\u91cf\u7acb\u523b\u589e\u52a01\uff0c\u81ea\u589e\u5206\u4e3a\u524d\u81ea\u589e<code>++a<\/code>\u548c\u540e\u81ea\u589e<code>a++<\/code>\uff0c\u524d\u81ea\u589e\u4f1a\u5728\u81ea\u589e\u540e\u8fd4\u56de\u65b0\u503c\uff0c\u540e\u81ea\u589e\u4f1a\u5728\u81ea\u589e\u4ee5\u540e\u8fd4\u56de\u65e7\u503c\uff0c\u81ea\u51cf\u540c\u7406\u3002<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u5173\u7cfb\u8fd0\u7b97\u7b26<\/h2>\n\n\n\n<ul><li>&gt; \u5927\u4e8e<\/li><li>&gt;= \u5927\u4e8e\u7b49\u4e8e<\/li><li>&lt; \u5c0f\u4e8e<\/li><li>&lt;= \u5c0f\u4e8e\u7b49\u4e8e<\/li><\/ul>\n\n\n\n<p>\u5173\u7cfb\u8fd0\u7b97\u7b26\u548c\u540e\u8fb9\u7684\u76f8\u7b49\u8fd0\u7b97\u7b26\u90fd\u7528\u6765\u6bd4\u8f83\u4e24\u4e2a\u503c\u7684\u5173\u7cfb\u662f\u5426\u6210\u7acb\uff0c\u5173\u7cfb\u6210\u7acb\u65f6\u8fd4\u56detrue\uff0c\u5426\u5219\u8fd4\u56defalse\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-lang=\"JavaScript\"><code>1 &lt; 5 \/\/ true\n1 &lt; &#39;5&#39; \/\/ true\n&#39;11&#39; &lt; &#39;5&#39; \/\/ true <\/code><\/pre><\/div>\n\n\n\n<p>\u6bd4\u8f83\u975e\u6570\u503c\u65f6\uff0c\u4f1a\u5148\u8f6c\u6362\u4e3a\u6570\u503c\u7136\u540e\u6bd4\u8f83\u3002\u5982\u679c\u4e24\u4fa7\u7684\u503c\u90fd\u662f\u5b57\u7b26\u4e32\uff0c\u5219\u4f1a\u9010\u4f4d\u6bd4\u8f83\u5b57\u7b26\u4e32\u7684Unicode\u7f16\u7801\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u76f8\u7b49\u8fd0\u7b97\u7b26<\/h2>\n\n\n\n<ul><li>== \u76f8\u7b49\u8fd0\u7b97\u7b26<\/li><li>=== \u5168\u7b49\u8fd0\u7b97\u7b26<\/li><li>!= \u4e0d\u7b49\u8fd0\u7b97\u7b26<\/li><li>!== \u4e0d\u5168\u7b49\u8fd0\u7b97\u7b26<\/li><\/ul>\n\n\n\n<p>\u6ce8\u610f\uff1a<\/p>\n\n\n\n<p>\u76f8\u7b49\u548c\u4e0d\u80fd\u8fd0\u7b97\u7b26\u6bd4\u8f83\u4e0d\u540c\u7c7b\u578b\u6570\u636e\u65f6\uff0c\u4f1a\u8f6c\u6362\u4e3a\u76f8\u540c\u7684\u7c7b\u578b\u8fdb\u884c\u6bd4\u8f83\uff08\u901a\u5e38\u4f1a\u8f6c\u6362\u4e3a\u6570\u5b57\uff09\u3002\u5168\u7b49\u548c\u4e0d\u5168\u7b49\u4e0d\u4f1a\u505a\u7c7b\u578b\u8f6c\u6362\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-lang=\"JavaScript\"><code>1 == &#39;1&#39; \/\/ true\n1 === &#39;1&#39; \/\/ false<\/code><\/pre><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\u903b\u8f91\u8fd0\u7b97\u7b26<\/h2>\n\n\n\n<ul><li>! \u903b\u8f91\u975e<\/li><li>&amp;&amp; \u903b\u8f91\u4e0e<\/li><li>|| \u903b\u8f91\u6216<\/li><\/ul>\n\n\n\n<p>\u6ce8\u610f\uff1a<\/p>\n\n\n\n<p>\u903b\u8f91\u4e0e\u8fd0\u7b97\uff0c\u5728\u8fd0\u7b97\u65f6\u4f1a\u5148\u68c0\u67e5\u7b2c\u4e00\u4e2a\u503c\u662f\u5426\u662ffalse\uff0c\u5982\u679c\u662ffalse\u76f4\u63a5\u8fd4\u56de\u7b2c\u4e00\u4e2a\uff0c\u5426\u5219\u8fd4\u56de\u7b2c\u4e8c\u4e2a\u3002\u903b\u8f91\u6216\u6b63\u597d\u76f8\u53cd\uff0c\u5728\u8fd0\u7b97\u65f6\u4f1a\u5148\u68c0\u67e5\u7b2c\u4e00\u4e2a\u503c\u662f\u5426\u662ftrue\uff0c\u5982\u679c\u662ftrue\u5219\u8fd4\u56de\u7b2c\u4e00\u4e2a\uff0c\u5426\u5219\u8fd4\u56de\u7b2c\u4e8c\u4e2a\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-lang=\"JavaScript\"><code>false && true \/\/ false\n0 && true \/\/ 0\ntrue || false \/\/ true\n1 || 2 \/\/ 1<\/code><\/pre><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\u6761\u4ef6\u8fd0\u7b97\u7b26<\/h2>\n\n\n\n<ul><li> condition ? exprIfTrue : exprIfFalse \u4e09\u5143\u8fd0\u7b97\u7b26<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd0\u7b97\u7b26\u7528\u6765\u5bf9\u4e00\u4e2a\u6216\u591a\u4e2a\u503c\u8fdb\u884c\u8fd0\u7b97\u5e76\u8fd4\u56de\u8fd0\u7b97\u7ed3\u679c\u3002\u6bd4\u5982\uff0c+\u5c31\u662f\u4e00\u4e2a\u8fd0\u7b97\u7b26\uff0c\u7528\u6765\u6c42\u4e24\u4e2a\u6570\u7684\u548c\u3002let a = 1  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6284,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[241],"tags":[200,247],"_links":{"self":[{"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/posts\/6301"}],"collection":[{"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lilichao.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6301"}],"version-history":[{"count":8,"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/posts\/6301\/revisions"}],"predecessor-version":[{"id":6493,"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/posts\/6301\/revisions\/6493"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lilichao.com\/index.php?rest_route=\/wp\/v2\/media\/6284"}],"wp:attachment":[{"href":"https:\/\/lilichao.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6301"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lilichao.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6301"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lilichao.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6301"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}