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. This Macro gives the absolute value of an integer.
3. If abs is called when STDLIB.H has been included, it is treated as a macro that expands to inline code.
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: %d\n", number, abs(number));
  return 0;
}

Output :

number : -1234  absolute value : 1234

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Tags / Keywords : | abs, math.h

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