#include <stdio.h> long absolute_value(long x) { if (x<0) // if x is negative x = -x; // negate x return x; // return x } int main() { long theValue=0; printf ("Enter a value: \n"); scanf ("%ld", &theValue); long theResult = absolute_value(theValue); printf ("The result is: %ld\n", theResult); return 0; }