C program to find the sum of odd and even numbers from 1 to N.

#include <stdio.h> void main() { int i, num, sum_of_odd = 0, sum_of_even = 0; printf("Enter the value of num\n"); scanf("%d", &num); for (i = 1; i <= num; i++) { if (i % 2 == 0) sum_of_even = sum_of_even + i; else sum_of_odd = sum_of_odd + i; } printf("Sum of all odd numbers = %d\n", sum_of_odd); printf("Sum of all even numbers = %d\n", sum_of_even); }