1.使用两个for循环嵌套生成九九乘法表; 2.外层循环 循环控制的行数; 3.内层循环 循环控制列数.
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
div {
display: inline-block;
width: 100px;
padding: 5px 10px;
border: 1px solid #000;
margin: 2px;
border-radius: 5px;
text-align: center;
background-color: rgba(255,255,25, .5);
/* 盒子阴影 */
box-shadow: 5px 5px 5px rgba(255,255,25, .5);
}
</style>
</head>
<body>
<script>
//1.外层循环 循环控制的行数
for(let i = 1; i <= 9; i++){
//2.内层循环 循环控制列数
for(let j = 1; j <= i; j++){
document.write(`<div> ${j} x ${i} = ${i * j} </div>` )
}
//换行
document.write(`<br>`)
}
</script>
</body>
</html>
