30、数字补0

2024-10-04 / 0 评论 / 1 阅读 / 正在检测是否收录...

10/04

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // 1、用户输入
        let num = prompt('请输入一个数字：')
        // 2、判断输出-小于10的才补0
        // num = num < 10 ? 0+num : num
        num = num >= 10 ? num : 0 + num
        alert(num)
    </script>
</body>
</html>

JavaScript