用Javascript在屏幕输出0-100以内所有偶数的和

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>1-100之间所有偶数的和</title>
    <script type="text/javascript">
        function oushuhe() {
            var sum = 0;
            for (var i = 0; i <= 100; i += 2) {
                if (i % 2 == 0) {
                    sum = sum + i;
                }
            }
            document.write(sum);
        }
        document.write("0-100之间所有偶数的和<br>sum = ");
        oushuhe();
    </script>
</head>

<body></body>

</html>

奇数同样的道理

更多推荐

用Javascript在屏幕输出0-100以内所有偶数的和