How to find the remainder of a division in C?

Question

Which is the best way to find out whether the division of two numbers will return a remainder? Let us take for example, I have an array with values {3,5,7,8,9,17,19}. Now I need

Answer 1

Use the modulus operator %, it returns the remainder.

int a = 5;
int b = 3;

if (a % b != 0) {
   printf("The remainder is: %i", a%b);
}