console 命令行工具 X clear

console

function writedocument(variable){
    document.write(variable+"<br/>");
}

writedocument("最大值最小值......");
writedocument("最大值："+Math.max(1,3,9,10,18,999));
writedocument("最小值："+Math.min(1,3,9,10,18,999));

writedocument("生成4位随机验证码.....");

function generateVerifyCode(length){
    var strLetterNumber = "0123456789ABCDEFGHIJKLMNOPQRST"
    var code ="";
    for(var i =0;i<length;++i);{
        var randomNumber = Math.floor(Math.random()*strLetterNumber.length);
        code= code+strLetterNumber.charAt(randomNumber);
    }

    return code;
}

writedocument(generateVerifyCode(4));
writedocument(generateVerifyCode(5));
writedocument(generateVerifyCode(6));

writedocument("生成随机的颜色 rgb（255，255，255）-----");
function generateRandomColor(){
    var red =Math.floor(Math.random()*256);
      var green =Math.floor(Math.random()*256);
      var blue =Math.floor(Math.random()*256);

}
 generateRandomColor();

<!DOCTYPE html> 
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
    <script>
      
    </script>
</head>
<body>
</body>
</html>