48、数组操作-改

2024-10-04 / 0 评论 / 4 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>
        // let arr = []
        // console.log(arr)
        // // console.log(arr[0]) //undefined
        // arr[0] = 1
        // console.log(arr)

        let arr = ['pink','red','green']
        // 修改
        // arr[0] = 'hotpink'
        // console.log(arr)
        // 给所有数组元素后面加个老师
        for (let i = 0; i < arr.length; i++){
           arr[i] = arr[i] + '老师'
        }
        console.log(arr)
    </script>
</body>
</html>

JavaScript