# C Program To Find Sum of Even and Odd Numbers

In this post, we will learn how to find sum of even and odd numbers using the C Programming language.

As we know, whole numbers which are exactly divisible by 2 are known as Even Numbers. For example: 2, 4, 12, 16, 256, . . . so on.

Similarly, whole numbers which are not exactly divisible by 2 are known as Odd Numbers. For example: 3, 5, 7, 13, 15, 247, . . . so on.

We will be calculating the sum of both even and odd numbers lying in a given range by using the divisibility logic.

So, without further ado, let’s begin this tutorial.

## C Program to find Sum of Even and Odd Numbers

```// C Program To Find Sum of Even and Odd Numbers
#include <stdio.h>
int main(){
int i, num, even_sum = 0, odd_sum = 0;

// Asking for Input
printf("Enter the Maximum Value: ");
scanf("%d", &num);

for (i = 1; i <= num; i++){
if (i % 2 == 0){
even_sum = even_sum + i;
}
else{
odd_sum = odd_sum + i;
}
}
printf("The Sum of all Even Numbers up to %d is %d.\n", num, even_sum);
printf("The Sum of all Odd Numbers up to %d is %d.", num, odd_sum);
return 0;
}
```

Output

``````Enter the Maximum Value: 100
The Sum of all Even Numbers up to 100 is 2550.
The Sum of all Odd Numbers up to 100 is 2500.
``````

## How Does This Program Work ?

``````    int i, num, even_sum = 0, odd_sum = 0;
``````

In this program, we have declared four int data type variables named i, num, even_sum and odd_sum

``````    // Asking for Input
printf("Enter the Maximum Value: ");
scanf("%d", &num);
``````

Then, the user is asked to enter the value of the maximum number.

``````    for (i = 1; i <= num; i++){
if (i % 2 == 0){
even_sum = even_sum + i;
}
else{
odd_sum = odd_sum + i;
}
}
``````

We have used for loop here, because for loop will make sure that the number lies between 1 and Maximum Value.

If the number is divisible by 2, then it satisfies the first condition, hence it is an even number. And we add the value of i to even_sum.

If the condition is false, then it means the number is an odd number. In this case, we add the value of i to odd_sum.

``````    printf("The Sum of all Even Numbers up to %d is %d.\n", num, even_sum);
printf("The Sum of all Odd Numbers up to %d is %d.", num, odd_sum);
``````

Finally, the sum of even and odd numbers is printed to the screen using printf() function. Here, %d format specifier indicates int data type.

## C Program To Find The Sum of Even and Odd Numbers in a Given Range

```// C Program To Find Sum of Even and Odd Numbers
#include <stdio.h>
int main(){
int i, min, max, even_sum = 0, odd_sum = 0;

// Asking for Input
printf("Enter the Minimum Value: ");
scanf("%d", &min);
printf("Enter the Maximum Value: ");
scanf("%d", &max);

for (i = min; i <= max; i++){
if (i % 2 == 0){
even_sum = even_sum + i;
}
else{
odd_sum = odd_sum + i;
}
}
printf("The Sum of all Even Numbers between %d and %d is %d.\n", min, max, even_sum);
printf("The Sum of all Odd Numbers between %d and %d is %d.", min, max, odd_sum);
return 0;
}
```

Output

``````Enter the Minimum Value: 10
Enter the Maximum Value: 50
The Sum of all Even Numbers between 10 and 50 is 630.
The Sum of all Odd Numbers between 10 and 50 is 600.
``````

## Conclusion

I hope after going through this post, you understand how to find the sum of even and odd Numbers Using C Programming language.

If you have any doubt regarding the problem, feel free to contact us in the comment section. We will be delighted to help you.