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Using the Math.floor() method to round numbers in JavaScript_Basic knowledge

WBOY
WBOYOriginal
2016-05-16 15:55:081446browse

This method returns the largest integer less than or equal to the parameter
Grammar

Math.floor( x ) ;

Here are the details of the parameters:

  • x : a number

Return value:

Returns the largest integer less than or equal to a number x
Example: 

<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>

This will produce the following results: 

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

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