JavaScript round() Method: Math Object
Description
The round() method of math object is used to get the value of a number rounded to the nearest integer. If the fractional part of the number is greater than or equal to .5, the argument is rounded to the next higher integer. If the fractional part of the number is less than .5, the argument is rounded to the next lower integer.
Version
Implemented in JavaScript 1.0
Syntax
round(x)
Parameter
x: Refers a number.
Example:
In the following web document, round() method rounded various numbers to their nearest integers.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
<title>JavaScript Math object - round() method example</title>
</head>
<body>
<h1 style="color: red">JavaScript Math object : round() method</h1>
<hr />
<script type="text/javascript">
document.write(Math.round(0.99) + "<br />");
document.write(Math.round(0.50) + "<br />");
document.write(Math.round(0.49) + "<br />");
document.write(Math.round(-22.45) + "<br />");
document.write(Math.round(-8.51)+ "<br />");
x=44.50
document.write(Math.round(x));
</script>
</body>
</html>
View the example in the browser
Supported Browser
| Internet Explorer 7 | Firefox 3.6 | Google Chrome 7 | Safari 5.0.1 | Opera 10 |
| Yes | Yes | Yes | Yes | Yes |
See also:
JavaScript Core objects, methods, properties.
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JavaScript sin() Method
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