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❮ C Exercise Example45 C Function Atoi ❯

C Library Function - fabs()

C Standard Library - <math.h>

Description

The C library function double fabs(double x) returns the absolute value of x.

Declaration

Here is the declaration for the fabs() function.

double fabs(double x)

Parameters

Return Value

This function returns the absolute value of x.

Example

The following example demonstrates the use of the fabs() function.

#include <stdio.h>
#include <math.h>

int main ()
{
   int a, b;
   a = 1234;
   b = -344;

   printf("The absolute value of %d is %lf\n", a, fabs(a));
   printf("The absolute value of %d is %lf\n", b, fabs(b));

   return(0);
}

Let's compile and run the above program, which will produce the following result:

The absolute value of 1234 is 1234.000000
The absolute value of -344 is 344.000000

C Standard Library - <math.h>

❮ C Exercise Example45 C Function Atoi ❯