js dowhile循环基本语法

<script type="text/javascript">
       //do while循环 至少会执行循环体一次
            var str = '';
            var i = 1;
            do {
                var t = '你好';
                str = str + t + '\n';
                i++;
            } while (i <= 10 )
            console.log(str);
</script>