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Rounding numbers in JavaScript

Category: JavaScript


Simple:

var x = 3.50;
Math.round(x);

// Output: 4

Simple (negative):

var x = -3.40;
Math.round(x);

// Output: -3

Rounded upwards:

var x = 5.25;
Math.ceil(x);

// Output: 6

One decimal:

var x = 5.26;
Math.round(x*10)/10;

// Output: 5.3

Two decimals:

var x = 6.789323;
Math.round(x*10)/10;

// Output: 6.79


Try it yourself below using this simple form (use the dot as a decimal separator):

Number: Number of decimals:




Here's a shortcut to this page if you should find it useful and would like an easy address to remember it by:
- www.wohill.com/round
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 Tags: round, round off
 Created by Niklas Waller - 2009-06-30 00:00:12
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