实例代码“Ctrl+/”提示“F11/ESC”全屏 返回 格式化 恢复 运行
​x
 
1
<!DOCTYPE html>
2
<html>
3
<body>
4
​
5
<p id="demo">Click the button to the absolute value of different numbers</p>
6
​
7
<button onclick="myFunction()">Try it</button>
8
​
9
<script>
10
function myFunction()
11
{
12
var a=Math.abs(7.25);
13
var b=Math.abs(-7.25);
14
var c=Math.abs(null);
15
var d=Math.abs("Hello");
16
var e=Math.abs(2+3);
17
​
18
var x=document.getElementById("demo");
19
x.innerHTML=a + "<br>" + b + "<br>" + c + "<br>" + d + "<br>" + e;
20
}
21
</script>
22
​
23
</body>
24
</html>