切换布局
显示结果
<html> <body> <script type = "text/javascript"> <!-- var a = true; var b = false; var linebreak = "<br />"; document.write("(a && b) => "); result = (a && b); document.write(result); document.write(linebreak); document.write("(a || b) => "); result = (a || b); document.write(result); document.write(linebreak); document.write("!(a && b) => "); result = (!(a && b)); document.write(result); document.write(linebreak); //--> </script> <p>给变量设置不同的值,并且使用不同的运算符尝试一下</p> </body> </html>