search

Home  >  Article  >  Web Front-end  >  Explanation of Math.round() method for rounding in JavaScript_Basic knowledge

Explanation of Math.round() method for rounding in JavaScript_Basic knowledge

WBOY
WBOYOriginal
2016-05-16 15:54:541416browse

This method returns the value of a number rounded to the nearest integer.
Grammar

Math.round( x ) ;

Here are the details of the parameters:

  • x: a number

Return value:

  • Returns the value of a number rounded to the nearest integer.

Example: 

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

var value = Math.round( 0.5 );
document.write("First Test Value : " + value ); 
 
var value = Math.round( 20.7 );
document.write("<br />Second Test Value : " + value ); 

var value = Math.round( 20.3 );
document.write("<br />Third Test Value : " + value ); 

var value = Math.round( -20.3 );
document.write("<br />Fourth Test Value : " + value ); 
</script>
</body>
</html>

This will produce the following results: 

First Test Value : 1
Second Test Value : 21
Third Test Value : 20
Fourth Test Value : -20

Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：Detailed explanation of the use of Math.sin() method in JavaScript_Basic knowledgeNext article：Detailed explanation of the use of Math.sin() method in JavaScript_Basic knowledge

Related articles

See more