循环语句输出金字塔
html
<!DOCTYPE html>
<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>
</head>
<body>
<script src="./1.js"></script>
</body>
</html>
js
var num=0;
for(var a=1 ;a<10;a++){
for(var j=1;j<10;j++){
for(var k=0; k<=a; k++){
document.write("  ");
}
num=a*j;
if(num/10<1){
num=a*j+" ";
}
if(j<=a) {
document.write(j + "*" + a + "=" + num+" ");
}
}
document.write("<br>");
}