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JavaScript ceil() Method: Math Object

Description

The ceil() method of math object is used to get the smallest integer, greater than or equal to a number.

Version

Implemented in JavaScript 1.0

Syntax

ceil(x)

Parameter

x: A number.

Example:

The following web document demonstrates how the ceil() method can be used.

<!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 - ceil() method example</title>
</head>
<body>
<h1 style="color: red">JavaScript Math object : ceil() method</h1>
<hr />
<script type="text/javascript">
document.write(Math.ceil(0.75) + "<br />");
document.write(Math.ceil(0.22) + "<br />");
document.write(Math.ceil(1.25) + "<br />");
document.write(Math.ceil(5) + "<br />");
document.write(Math.ceil(22.1) + "<br />");
document.write(Math.ceil(-33.2) + "<br />");
document.write(Math.ceil(-8.9));
</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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Next: JavaScript cos() Method: Math Object

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JavaScript: Tips of the Day

Returns true if the given number is a power of 2, false otherwise

Example:

const tips_isPowerOfTwo = n => !!n && (n & (n - 1)) == 0;
console.log(tips_isPowerOfTwo(0)); 
console.log(tips_isPowerOfTwo(4));
console.log(tips_isPowerOfTwo(16));

Output:

false
true
true