JavaScript Math.floor() 方法详解与示例

Math.floor( x ) ;

代码示例与结果分析

<html>
<head>
<title>JavaScript Math floor() Method</title>
</head>
<body>
<script type="text/javascript">

var value = Math.floor(10.3);
document.write("First Test Value : " + value ); 
 
var value = Math.floor(30.9);
document.write("<br />Second Test Value : " + value ); 

var value = Math.floor(-2.9);
document.write("<br />Third Test Value : " + value ); 

var value = Math.floor(-2.2);
document.write("<br />Fourth Test Value : " + value ); 
</script>
</body>
</html>

First Test Value : 10
Second Test Value : 30
Third Test Value : -3
Fourth Test Value : -3