C Programming Code Examples C > Beginners Lab Assignments Code Examples Program to Calculate the Sum of Odd & Even Numbers Program to Calculate the Sum of Odd & Even Numbers This is a C program to find the sum of odd and even numbers from 1 to N. - Take the number N upto which we have to find the sum as input. - Using for loop take the elements one by one from 1 to N. - Using if, else statements separate the element as even or odd. - Add the even and odd numbers separately and store it in different variables. - Print the sum separately and exit. #include <stdio.h> void main() { int x, j, odd_sum = 0, even_sum = 0; printf("Enter the value of j\n"); scanf("%d", &j); for (x = 1; x <= j; x++) { if (x % 2 == 0) even_sum = even_sum + x; else odd_sum = odd_sum + x; } printf("Sum of all odd numbers = %d\n", odd_sum); printf("Sum of all even numbers = %d\n", even_sum); } - User must first enter the number upto which he/she wants to find the sum and is stored in the variable j. - Using for loop take the elements one by one from 1 to j. - Use if, else statement for each element to find whether it is odd or even by dividing the element by 2. - Initialize the variables odd_sum and even_sum to zero. - If the element is even,then increment the variable even_sum with the current element. - If the element is odd, then increment the variable odd_sum with the current element. - Print the variables odd_sum and even_sum separately and exit.