数组翻转.png
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>翻转数组</title>
<script>
var arr = ['green', 'blue', 'yellow', 'purple', 'red'];
var newArr = [];
for (i = arr.length - 1; i >= 0; i--) {
newArr[newArr.length] = arr[i]
}
console.log(newArr);
</script>
</head>
<body>
</body>
</html>
