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C Brain Teasers: Exercise Your Mind

Discussion: Eenie, Meenie, Miney, Mod

Explore the modulo operator in C to understand how it returns remainders and counts intervals. Learn to correctly use the operator to produce predictable output and avoid errors such as division by zero, enhancing your coding reliability.

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Run the code

Now, it's time to execute the code and observe the output.

C
#include <stdio.h>
int main()
{
  int m = 1;
  while( m<10 ) {
    if( 2%m )
      printf("%d - Odd\n", m);
    else
      printf("%d - Even\n", m);
    m++;
  }
  
return(0);
}

Modulo operator mantra

The modulo operator (%) returns the remainder of the first number divided by the second: 5 % 3 results in two, the remainder of 5 ÷ 3. While such expressions are interesting, ...