js之遍历数组、字符串
js之遍历数组、字符串
1、遍历数组
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>遍历数组</title>
</head>
<body>
<script>
const arr = [11, 22, 33, 44, 55, 66] // 创建数组
// 遍历数组
for (let i = 0; i < arr.length; i++) {
console.log(arr[i])
} // 遍历数组
for (let key in arr) {
console.log(key + --- + arr[key])
} // 遍历数组
for (let key of arr) {
console.log(key);
} // 遍历数组
</script>
</body>
</html>
2、遍历字符串
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>遍历字符串</title>
</head>
<body>
<script>
let data1 = "你好,嗨,哈喽,Hi,Hello,非常高兴";
let arr1 = data1.split(","); // 字符串转数组（通过","）
console.log("arr1:", arr1);
for (let i = 0; i < arr1.length; i++) {
console.log(arr1[i])
}
</script>
</body>
</html>
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