# C Program to Sum of Even and Odd Numbers in an Array

In this tutorial, i am going to show you how to calculate or find sum of even and odd numbers in an array using in c programs.

## All C Programs and Algorithm to Sum of Even and Odd Numbers in an Array

• C Program to Sum of Even and Odd Numbers in an Array using For Loop
• C Program to Sum of Even and Odd Numbers in an Array using While Loop
• C Program to Sum of Even and Odd Numbers in an Array using Function

### C Program to Sum of Even and Odd Numbers in an Array using For Loop

```/* C Program to find Sum of Even and Odd Numbers in an Array */
#include<stdio.h>

int main()
{
int Size, i, a;
int Even_Sum = 0, Odd_Sum = 0;

printf("\n Please Enter the Size of an Array : ");
scanf("%d", &Size);

printf("\nPlease Enter the Array Elements\n");
for(i = 0; i < Size; i++)
{
scanf("%d", &a[i]);
}

for(i = 0; i < Size; i ++)
{
if(a[i] % 2 == 0)
{
Even_Sum = Even_Sum + a[i];
}
else
{
Odd_Sum = Odd_Sum + a[i];
}
}

printf("\n The Sum of Even Numbers in this Array = %d ", Even_Sum);
printf("\n The Sum of Odd Numbers in this Array = %d ", Odd_Sum);
return 0;
}```

The result of the above c program; as follows:

```Please Enter the Size of an Array : 5
Please Enter the Array Elements
1 2 3 4 5
The Sum of Even Numbers in this Array = 6
The Sum of Odd Numbers in this Array = 9 ```

### C Program to Sum of Even and Odd Numbers in an Array using While Loop

```/* C Program to find Sum of Even and Odd Numbers in an Array */
#include<stdio.h>
int main()
{
int Size, i, j = 0, a;
int Even_Sum = 0, Odd_Sum = 0;

printf("\n Please Enter the Size of an Array : ");
scanf("%d", &Size);

printf("\nPlease Enter the Array Elements\n");
for(i = 0; i < Size; i++)
{
scanf("%d", &a[i]);
}
while(j < Size)
{
if(a[j] % 2 == 0)
{
Even_Sum = Even_Sum + a[j];
}
else
{
Odd_Sum = Odd_Sum + a[j];
}
j++;
}
printf("\n The Sum of Even Numbers in this Array = %d ", Even_Sum);
printf("\n The Sum of Odd Numbers in this Array = %d ", Odd_Sum);
return 0;
}```

The result of the above c program; as follows:

```Please Enter the Size of an Array : 5
Please Enter the Array Elements
1 5 8 9 10
The Sum of Even Numbers in this Array = 18
The Sum of Odd Numbers in this Array = 15 ```

### C Program to Sum of Even and Odd Numbers in an Array using Function

```/* C Program to Count Even and Odd Numbers in an Array */
#include<stdio.h>
int CountEvenNumbers(int a[], int Size);
int CountOddNumbers(int a[], int Size);
int main()
{
int Size, i, a;
int Even_Count = 0, Odd_Count = 0;

printf("\n Please Enter the Size of an Array : ");
scanf("%d", &Size);

printf("\nPlease Enter the Array Elements :  ");
for(i = 0; i < Size; i++)
{
scanf("%d", &a[i]);
}

Even_Count = CountEvenNumbers(a, Size);
Odd_Count = CountOddNumbers(a, Size);

printf("\n Total Number of Even Numbers in this Array = %d ", Even_Count);
printf("\n Total Number of Odd Numbers in this Array = %d ", Odd_Count);
return 0;
}
int CountEvenNumbers(int a[], int Size)
{
int i, Even_Count = 0;
printf("\n List of Even Numbers in this Array: ");
for(i = 0; i < Size; i ++)
{
if(a[i] % 2 == 0)
{
printf("%d  ", a[i]);
Even_Count++;
}
}
return Even_Count;
}
int CountOddNumbers(int a[], int Size)
{
int i, Odd_Count = 0;
printf("\n List of Odd Numbers in this Array: ");
for(i = 0; i < Size; i ++)
{
if(a[i] % 2 != 0)
{
printf("%d  ", a[i]);
Odd_Count++;
}
}
return Odd_Count;
}```

The result of the above c program; as follows:

```Please Enter the Size of an Array : 5
Please Enter the Array Elements :  10 5 25 30 40
List of Even Numbers in this Array: 10  30  40
List of Odd Numbers in this Array: 5  25
Total Number of Even Numbers in this Array = 3
Total Number of Odd Numbers in this Array = 2 ```