Question

How to use fabs() function to get the absolute value of a floating point value N in C

Answer 1

#include <stdio.h>     
#include <math.h>
 
int main(int argc, char **argv)
{
	printf("fabs(-1.1) = %.6f\n", fabs(-1.1));
    printf("fabs(1.1) = %.6f\n", fabs(1.1));
    printf("fabs(0) = %.6f\n", fabs(0));
	printf("fabs(-0) = %.6f\n", fabs(-0));
	printf("fabs(-0.5) = %.6f\n", fabs(-0.5));
	printf("fabs(-INFINITY) = %f\n", fabs(-INFINITY));

    return 0;
}

// 1.#INF00 - inf - Numerical result out of range

/*
run:
  
fabs(-1.1) = 1.100000
fabs(1.1) = 1.100000
fabs(0) = 0.000000
fabs(-0) = 0.000000
fabs(-0.5) = 0.500000
fabs(-INFINITY) = 1.#INF00

*/

 

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