![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
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Teacher's comments：
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<!DOCTYPE html>
<html lang="en">
<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>九九乘法表</title>
</head>
<body>
<script>
for (i = 1; i <= 9; i++) {
for (j = 1; j <= 9; j++) {
document.write(i + "x" + j + "=" + i * j + " ");
if (i == j) {
document.write("<br/>");
break;
}
}
}
//星号三角
for (i = 0; i < 10; i++) {
for (j = 0; j < 10 - i; j++) {
document.write(" ");
}
for (n = 0; n < 1 + (i * 2); n++) {
document.write("*");
}
document.write("<br>");
}
var i = 1;
var j = 1;
while (i <= 5) {
j = 1;
while (j <= i) {
document.write("*");
j++;
}
document.write("<br>");
i++;
}
</script>
</body>
</html>点击 "运行实例" 按钮查看在线实例
