C program to insert element in an array at specified position

By | 11.11.2016

Insert element in an array

Write a C program to insert element in an array at specified position. Here’s simple program to insert element in an array at specified position 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 insert element in an array at specified position. The C program is successfully compiled and run(on Codeblocks) on a Windows system. The program output is also shown in below.


/*  C program to insert element in an array at specified position */

#include <stdio.h>

int main()
    int arr[100];
    int i, size, num, position;

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

     * Read element to insert and position of the element
    printf("\nEnter element to insert : ");
    scanf("%d", &num);
    printf("\nEnter the element position : ");
    scanf("%d", &position);

     * If the position of element is not valid
    if(position>size+1 || position<=0)
        printf("\nInvalid position! Please enter position between 1 to %d", size);
         * Inserts element in array and increases the size of the array
        for(i=size; i>=position; i--)
            arr[i] = arr[i-1];
        arr[position-1] = num;

         * Prints the new array after insert operation
        printf("\nArray elements after insertion :: ");
        for(i=0; i<size; i++)
            printf(" %d ", arr[i]);

    return 0;


Enter size of the array : 7

Enter 7 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 element to insert : 0

Enter the element position : 1

Array elements after insertion ::  0  1  2  3  4  5  6  7

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About Tunde A

My name is Tunde Ajetomobi, a Tech Enthusiast and Growth Hacker. I enjoy creating helpful content that solves problem across different topics. Codezclub is my way of helping young aspiring programmers and students to hone their skills and find solutions on fundamental programming languages.

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pls change theme or source code colour