js基础2作业11

2018-08-20  本文已影响0人  HavenYoung

自己实现随机 a, b 之间的整型

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
    </head>
    <body>
        <script type="text/javascript">
            function randint(a, b) {
                if(a > b){
                    a = a + b;
                    b = a - b;
                    a = a - b;
                    
                }
                while(true){
                var num = Math.random()*b*10
                num = Math.round(num)
                if(num >= a && num <= b){
                    document.write("<p>")
                    document.write(num)
                    document.write("</p>")
                    break;
                    }
                }   
            }
            randint(2,20)
        </script>
    </body>
</html>

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