4. Find GCD of two numbers

#include <stdio.h>

int main()
{
    int num1, num2, i, gcd;
    printf("Enter two numbers : ");
    scanf("%d %d", &num1, &num2);

    for(i = 1; i <= num1 && i <= num2; i++)
    {
        if((num1 % i == 0) && (num2 % i == 0))
            gcd = i;
    }

    printf("\nThe GCD of %d & %d is : %d\n", num1, num2, gcd);
    return 0;
}