console
for (let i = 1; i <= 4; i++) {
let temp = "";
for (let j = 1; j <= 4 - i; j++) {
temp += " ";
}
for (let k = 1; k <= 2 * i - 1; k++) {
temp += "*";
}
console.log(temp);
}
for (let i = 1; i <= 3; i++) {
let temp = "";
for (let j = 1; j <= i; j++) {
temp += " ";
}
for (let k = 1; k <= 7 - 2 * i; k++) {
temp += "*";
}
console.log(temp);
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" type="text/css" href="">
</head>
<body>
<script src = ./ling.js></script>
</body>
</html>