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Abs(x) >> Absolute Value >> Math.h Function

Abs >> Math.h Function >>
Syntax 1 [Return Double] : 

double abs(complex x);


Syntax 2 [Return Integer] :


int abs(int x);


    

  1. abs is not a function , it is macro. 
    2. 

  2. This Macro gives the absolute value of an integer.
    3. 

  3. If abs is called when STDLIB.H has been included, it is treated as a macro that expands to inline code.
    4. 

  4. If you want to use the abs function instead of the macro, include #undef abs in your program, after the #include <STDLIB.H>. 
    5. 



Live Example : 


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

int main(void)
{
  int number = -1234;
  printf("number: %d  absolute value: %dn", number, abs(number));
  return 0;
}


Output : 


number : -1234  absolute value : 1234