// 将数组[ 'red', 'green', 'blue', 'pink ', " purple"]的内容反过来存放

    // 1、声明一个新数组newArr     //2、把旧数组索引号第4个取过来（arr.length - 1)，给新数组索引号第0个元素(newArr.length)     // 3、我们采取递减的方式i--

<script>
  
    var arr = ["red", "green", "blue", "pink ", " purple"];
    var newArr = [];
    for (var i = arr.length - 1; i >= 0; i--) {
      newArr[newArr.length] = arr[i];
    }
    console.log(newArr);
  </script>