C Exercises: Count number of even elements in a given array of integers

Last update on January 17 2025 13:37:31 (UTC/GMT +8 hours)

Write a C program to count the even number of elements in a given array of integers.

C Code:

#include <stdio.h>
#include <stdlib.h>

// Function prototype for 'test'
int test(int nums[], int arr_size);

int main(void){
    // Declaration and initialization of an integer array 'array1'
    int array1[] = {1, 2, 5, 7, 9, 10, 12};

    // Calculating the size of the array 'array1'
    int arr_size = sizeof(array1)/sizeof(array1[0]);

    // Printing the result of the 'test' function for the array 'array1'
    printf("%d",test(array1, arr_size));
}    

// Definition of the 'test' function
int test(int nums[], int arr_size)
{
    // Declaration of a variable 'evens' to count even numbers
    int evens = 0;

    // Looping through the elements of the array
    for (int i = 0; i < arr_size; i++)
    {
        // Checking if the current element is even
        if (nums[i] % 2 == 0) evens++;
    }

    // Returning the count of even numbers
    return evens;
}  

Sample Output:

3

Pictorial Presentation:

Flowchart:

C Programming Code Editor:

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