Published Apr 11, 2023Updated May 15, 2024
Contribute to Docs

The Math.Abs() class method returns the absolute value of a given number.



The Math.Abs() method takes only one parameter, number, a decimal, double or integer type number. The method returns the absolute value of the number with the same type as the number, except if the value of number equals:

  • NaN (not a number), then it returns NaN
  • NegativeInfinity, then it returns PositiveInfinity
  • PositiveInfinity, then it also returns PositiveInfinity


The following example uses the Math.Abs() method to return the absolute value of a decimal and a double type number. Then, the Console.WriteLine() function prints the results to the console:

using System;
public class Example {
public static void Main() {
decimal num1 = -1.23M;
double num2 = 6.674E-11;
decimal abs1 = Math.Abs(num1);
double abs2 = Math.Abs(num2);
Console.WriteLine("The absolute value of " + num1 + " is: " + abs1);
Console.WriteLine("The absolute value of " + num2 + " is: " + abs2);

The example will result in the following output:

The absolute value of -1.23 is: 1.23
The absolute value of 6.674E-11 is: 6.674E-11

Codebyte Example

The following example is runnable and returns the absolute value of a double type number:

Visit us
Hide code
Hide output
Hide output

All contributors

Looking to contribute?

Learn C# on Codecademy