​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>JavaScript 数字</h1>
​
<p>数字可以写成带小数或不带小数：</p>
​
<p id="demo"></p>
​
<script>
let x = 3.14;
let y = 3;
document.getElementById("demo").innerHTML = x + "<br>" + y;
</script>
​
</body>
</html>
​