<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>복합 연산자</title>
<script>
var x = 10;
var y = 20;
//x = x + 10;
//x += 10;
//y = y - 10;
//y -= 10
//x = x * 10;
//x *= 10;
//y = y / 10;
//y /= 10;
//x = x % 10;
//x %= 10;
document.write(x);
</script>
</head>
<body>
</body>
</html>