{"id":291,"date":"2020-02-04T21:02:29","date_gmt":"2020-02-04T13:02:29","guid":{"rendered":"https:\/\/blog.cqdefxxx.com\/?p=291"},"modified":"2020-02-04T21:02:29","modified_gmt":"2020-02-04T13:02:29","slug":"if%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/blog.viter.top\/index.php\/2020\/02\/04\/if%e8%af%ad%e5%8f%a5\/","title":{"rendered":"if\u8bed\u53e5"},"content":{"rendered":"<pre class=\"pure-highlightjs\"><code class=\"\">&lt;!DOCTYPE html&gt;\n&lt;html&gt;\n\t&lt;head&gt;\n\t\t&lt;meta charset=\"UTF-8\"&gt;\n\t\t&lt;title&gt;&lt;\/title&gt;\n\t\t&lt;script type=\"text\/javascript\"&gt;\n\t\t\t\n\t\t\t\/*\n\t\t\t * if\u8bed\u53e5\n\t\t\t * \t\u8bed\u6cd5\u4e8c:\n\t\t\t * \t\tif(\u6761\u4ef6\u8868\u8fbe\u5f0f){\n\t\t\t * \t\t\t\u8bed\u53e5...\n\t\t\t * \t\t}else{\n\t\t\t * \t\t\t\u8bed\u53e5...\n\t\t\t * \t\t}\n\t\t\t * \n\t\t\t * \tif...else...\u8bed\u53e5\n\t\t\t * \t\t\u5f53\u8be5\u8bed\u53e5\u6267\u884c\u65f6\uff0c\u4f1a\u5148\u5bf9if\u540e\u7684\u6761\u4ef6\u8868\u8fbe\u5f0f\u8fdb\u884c\u6c42\u503c\u5224\u65ad\uff0c\n\t\t\t * \t\t\t\u5982\u679c\u8be5\u503c\u4e3atrue\uff0c\u5219\u6267\u884cif\u540e\u7684\u8bed\u53e5\n\t\t\t * \t\t\t\u5982\u679c\u8be5\u503c\u4e3afalse\uff0c\u5219\u6267\u884celse\u540e\u7684\u8bed\u53e5\n\t\t\t * \n\t\t\t * \t\u8bed\u6cd5\u4e09\uff1a\n\t\t\t * \t\tif(\u6761\u4ef6\u8868\u8fbe\u5f0f){\n\t\t\t * \t\t\t\u8bed\u53e5...\n\t\t\t * \t\t}else if(\u6761\u4ef6\u8868\u8fbe\u5f0f){\n\t\t\t * \t\t\t\u8bed\u53e5...\n\t\t\t * \t\t}else if(\u6761\u4ef6\u8868\u8fbe\u5f0f){\n\t\t\t * \t\t\t\u8bed\u53e5...\n\t\t\t * \t\t}else{\n\t\t\t * \t\t\t\u8bed\u53e5...\n\t\t\t * \t\t}\n\t\t\t * \n\t\t\t * \t\tif...else if...else\n\t\t\t * \t\t\t\u5f53\u8be5\u8bed\u53e5\u6267\u884c\u65f6\uff0c\u4f1a\u4ece\u4e0a\u5230\u4e0b\u4f9d\u6b21\u5bf9\u6761\u4ef6\u8868\u8fbe\u5f0f\u8fdb\u884c\u6c42\u503c\u5224\u65ad\n\t\t\t * \t\t\t\u5982\u679c\u503c\u4e3atrue\uff0c\u5219\u6267\u884c\u5f53\u524d\u8bed\u53e5\u3002\n\t\t\t * \t\t\t\u5982\u679c\u503c\u4e3afalse\uff0c\u5219\u7ee7\u7eed\u5411\u4e0b\u5224\u65ad\u3002\n\t\t\t * \t\t\t\u5982\u679c\u6240\u6709\u7684\u6761\u4ef6\u90fd\u4e0d\u6ee1\u8db3\uff0c\u5219\u6267\u884c\u6700\u540e\u4e00\u4e2aelse\u540e\u7684\u8bed\u53e5\n\t\t\t * \t\t\t\u8be5\u8bed\u53e5\u4e2d\uff0c\u53ea\u4f1a\u6709\u4e00\u4e2a\u4ee3\u7801\u5757\u88ab\u6267\u884c\uff0c\u4e00\u65e6\u4ee3\u7801\u5757\u6267\u884c\u4e86\uff0c\u5219\u76f4\u63a5\u7ed3\u675f\u8bed\u53e5\n\t\t\t *\/\n\t\t\t\n\t\t\tvar age = 50;\n\t\t\t\n\t\t\t\/*if(age &gt;= 60){\n\t\t\t\talert(\"\u4f60\u5df2\u7ecf\u9000\u4f11\u4e86~~\");\n\t\t\t}else{\n\t\t\t\talert(\"\u4f60\u8fd8\u6ca1\u9000\u4f11~~~\");\n\t\t\t}*\/\n\t\t\t\n\t\t\tage = 200;\n\t\t\t\n\t\t\t\/*if(age &gt; 100){\n\t\t\t\talert(\"\u6d3b\u7740\u633a\u6ca1\u610f\u601d\u7684~~\");\n\t\t\t}else if(age &gt; 80){\n\t\t\t\talert(\"\u4f60\u4e5f\u8001\u5927\u4e0d\u5c0f\u7684\u4e86~~\");\t\n\t\t\t}else if(age &gt; 60){\n\t\t\t\talert(\"\u4f60\u4e5f\u9000\u4f11\u4e86~~\");\n\t\t\t}else if(age &gt; 30){\n\t\t\t\talert(\"\u4f60\u5df2\u7ecf\u4e2d\u5e74\u4e86~~\");\n\t\t\t}else if(age &gt; 17){\n\t\t\t\talert(\"\u4f60\u5df2\u7ecf\u6210\u5e74\u4e86\");\n\t\t\t}else{\n\t\t\t\talert(\"\u4f60\u8fd8\u662f\u4e2a\u5c0f\u5b69\u5b50~~\");\n\t\t\t}*\/\n\t\t\t\n\t\t\tage = 90;\n\t\t\t\n\t\t\tif(age &gt; 17 &amp;&amp; age &lt;= 30){\n\t\t\t\talert(\"\u4f60\u5df2\u7ecf\u6210\u5e74\u4e86\");\n\t\t\t}else if(age &gt; 30 &amp;&amp; age &lt;= 60){\n\t\t\t\talert(\"\u4f60\u5df2\u7ecf\u4e2d\u5e74\u4e86\");\n\t\t\t}else if(age &gt; 60 &amp;&amp; age &lt;= 80){\n\t\t\t\talert(\"\u4f60\u5df2\u7ecf\u9000\u4f11\u4e86\");\n\t\t\t}else{\n\t\t\t\talert(\"\u4f60\u5c81\u6570\u633a\u5927\u7684\u4e86~~\");\n\t\t\t}\n\t\t\t\n\t\t\t\n\t\t&lt;\/script&gt;\n\t&lt;\/head&gt;\n\t&lt;body&gt;\n\t&lt;\/body&gt;\n&lt;\/html&gt;\n<\/code><\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&lt;!DOCTYPE html&gt; 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