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× C++ Standard Library C++ STL Library


The C++ cmath abs() function is used to return the absolute value (positive value) of the specified number. For example - absolute value of x will be |x|.

Syntax

double abs(double x);
float abs(float x);
long double abs(long double x);
double abs(double x);
float abs(float x);
long double abs(long double x);
//additional overloads for integral types
double abs(T x);                                      

Parameters

x Specify a number whose absolute value need to be determined.

Return Value

Returns the absolute value (positive value) of the argument.

Example:

In the below example, abs() function is used to return the absolute value (positive value) of the specified number.

#include <iostream>
#include <cmath>

using namespace std;
 
int main (){
  cout<<abs(10)<<"\n";
  cout<<abs(-10)<<"\n";
  cout<<abs(-5.45)<<"\n";
  cout<<abs(-5.55)<<"\n";  
  return 0;
}

The output of the above code will be:

10
10
5.45
5.55

❮ C++ <cmath> Library