RUNOOB.COM
源代码:
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟教程(runoob.com)</title> </head> <body> <p>点击下面的按钮,只要 i 小于 5 就一直循环代码块。</p> <button onclick="myFunction()">点击这里</button> <p id="demo"></p> <script> function myFunction(){ var x="",i=0; while (i<5){ x=x + "该数字为 " + i + "<br>"; i++; } document.getElementById("demo").innerHTML=x; } </script> </body> </html>
运行结果