Write a C program to count even and odd elements in an array

Count even and odd elements in an array


Write a C program to count even and odd elements in an array.¬†Here’s simple program to count even and odd elements in an array in C Programming Language.


What is an Array ?


Arrays a kind of data structure that can store a fixed-size sequential collection of elements of the same type. An array is used to store a collection of data, but it is often more useful to think of an array as a collection of variables of the same type.

Instead of declaring individual variables, such as number0, number1, …, and number99, you declare one array variable such as numbers and use numbers[0], numbers[1], and …, numbers[99] to represent individual variables. A specific element in an array is accessed by an index.

All arrays consist of contiguous memory locations. The lowest address corresponds to the first element and the highest address to the last element.


Here is source code of the C program to count even and odd elements in an array. The C program is successfully compiled and run(on Codeblocks) on a Windows system. The program output is also shown in below.


SOURCE CODE : :


/*  C program to count even and odd elements in an array  */

#include <stdio.h>

#define MAX_SIZE 100 //Maximum size of the array

int main()
{
    int arr[MAX_SIZE];
    int i, N, even, odd;

    /*
     * Reads size and elements in array
     */
    printf("Enter size of the array: ");
    scanf("%d", &N);
    printf("\nEnter %d elements in array :: \n", N);
    for(i=0; i<N; i++)
    {
        printf("\nEnter %d element in array :: ", i+1);
        scanf("%d", &arr[i]);
    }

    /* Assuming that there are 0 even and odd elements */
    even = 0;
    odd  = 0;

    for(i=0; i<N; i++)
    {
        /* If the current element of array is even then increment even count */
        if(arr[i]%2 == 0)
        {
            even++;
        }
        else
        {
            odd++;
        }
    }

    printf("\nTotal even elements: %d\n", even);
    printf("\nTotal odd elements: %d\n", odd);

    return 0;
}

OUTPUT : :


Enter size of the array: 8

Enter 8 elements in array ::

Enter 1 element in array :: 1

Enter 2 element in array :: 2

Enter 3 element in array :: 3

Enter 4 element in array :: 4

Enter 5 element in array :: 5

Enter 6 element in array :: 6

Enter 7 element in array :: 7

Enter 8 element in array :: 8

Total even elements: 4

Total odd elements: 4

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