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<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>双重嵌套循环</title>
<!-- 模拟 一周 7天，每天吃 3 顿饭 计算一共吃了多少顿饭 每顿饭 20元-->
<script>
var total = 0; //吃了总饭数
var price = 20; // 每顿饭20元
for (var zhou = 1; zhou <= 7; zhou++) {
console.log('------------第' + zhou + '天开始----------------');
for (var fan = 1; fan <= 3; fan++) {
total = zhou * fan;
console.log('------吃了' + fan + '顿饭-------');
}
console.log('------------第' + zhou + '天结束-----------------');
}
console.log('一共吃了' + total + '顿饭 ' + '共吃了:' + (price *= total) + '元' );
</script>
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<body>
</body>
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