Even or Odd

#include <stdio.h>

int ifEvenOrOdd() {
  int num;
  printf("Enter an integer: ");
  scanf("%d", &num);
  // true if num is perfectly divisible by 2
  if(num % 2 == 0)
    printf("%d is even.", num);
  else
    printf("%d is odd.", num);
  return 0;
}