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Introducing the use of Math.abs() method in JavaScript_Basic knowledge

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Release： 2016-05-16 15:55:07

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This method returns the absolute value of a number.
Grammar

Math.abs( x ) ;

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Here are the details of the parameters:

x : a number

Return value:

Returns the absolute value of a number

Example:

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

var value = Math.abs(-1);
document.write("First Test Value : " + value ); 
 
var value = Math.abs(null);
document.write("<br />Second Test Value : " + value ); 

var value = Math.abs(20);
document.write("<br />Third Test Value : " + value ); 

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

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This will produce the following results:

First Test Value : 1
Second Test Value : 0
Third Test Value : 20
Fourth Test Value : NaN

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Related labels：

javascript math

source：php.cn

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