请老师检查谢谢

来源：6-11 编程练习

慕UI4313976

2020-04-12 20:58:28

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>逻辑操作符</title>
</head>
<body>
    <script>
        //补充代码
        var x=NaN,y=undefined,z=1;
        var m=1,n="0",j=33;
        var a=!(!undefined),b=!0;

        var r1 = x || y || z;
        var r2 = m || n ||j;
        var r3 = a || b;
        document.write("x || y || z:"+r1,"<br>","m || n || j:"+r2,"<br>","a || b:"+r3)
    </script>
</body>
</html>

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