C program to declare, initialize, input and print array elements

Write a C program to declare, initialize, input elements in array and print array. How to input and display elements in an array using for loop in C programming. C program to input and print array elements using loop.

Input size: 10
Input elements: 1
2
3
4
5
6
7
8
9
10

Output: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

Required knowledge

Basic Input Output, For loop, Array

How to input and print array elements?

Array uses an index for accessing an element. Array index starts from 0 to N-1 (where N is the number of elements in array).

To access any an array element we use.

array[0] = 10
array[1] = 20
array[2] = 30

array[9] = 100

Since array index is an integer value. Hence, rather hard-coding constant array index, you can use integer variable to represent index. For example,

int i = 0;
array[i] = 10; // Assigns 10 to first array element

Program to input and print array elements

/**
 * C program to read and print elements in an array
 */

#include <stdio.h>
#define MAX_SIZE 1000 // Maximum array size

int main()
{
    int arr[MAX_SIZE]; // Declare an array of MAX_SIZE
    int i, N;

    /* Input array size */
    printf("Enter size of array: ");
    scanf("%d", &N);

    /* Input elements in array */
    printf("Enter %d elements in the array : ", N);
    for(i=0; i<N; i++)
    {
        scanf("%d", &arr[i]);
    }


    /*
     * Print all elements of array
     */
    printf("\nElements in array are: ");
    for(i=0; i<N; i++)
    {
        printf("%d, ", arr[i]);
    }

    return 0;
}

Note: Using i < N is equivalent to i <= N-1.

Advance your skills by learning this using recursive approach.

Learn more – Program to print array elements using recursion.

The above method uses array notation to print elements. You can also use pointer notation to access an array in C. The statement arr[i] is equivalent to *(arr + i).

Learn how to access array using pointers?

Enter size of array: 10
Enter 10 elements in the array : 10
20
30
40
50
60
70
80
90
100

Elements in array are : 10, 20, 30, 40, 50, 60, 70, 80, 90, 100,

Happy coding 😉