Description

* An element can only be inserted if memory space allocated for array is still available.
* To add number at the end just increment upper bound to 1 and assign the value.
* If insert an element at particular position, increment the index of all elements by 1 
  which is right to position of element to be inserted then insert element at that position.

C/C++

/* C program to insert element at a given location*/
//Save it as InsertElementGivenLocation.c


#include<stdio.h>
int main(){

    int i, n, pos, num;

    
    /* Declare array of larger size so that memory will be 
     available for element to be inserted */
    
    int arr[100];

    printf("Enter the size of array : ");
    scanf("%d",&n);

    printf("Enter the elements of the array : ");
    for (i = 0; i < n; i++) {
        scanf("%d",&arr[i]);
    }

    printf("Enter the position where elements to be entered : ");
    scanf("%d",&pos);

    printf("Enter the element to be entered : ");
    scanf("%d",&num);

    
    /* Execute a loop to move all elements right by 1 position having 
    index greater than position where to insert element */
    
    for(i=n-1;i>=pos;i--) {
        arr[i+1] = arr[i];
    }

    // Insert element at given position
    arr[pos] = num;

    // Finally print new array after insertion of new element
    printf("The new array is : ");
    for(i=0;i<=n;i++) {
        printf("%d ", arr[i]);
    }
    
    return 0;
}

Input:
Enter the size of array : 
4
Enter the elements of the array : 
6
4
2
8
Enter the position where elements to be entered : 
2
Enter the element to be entered : 
7

Output:
The new array is : 
6 4 7 2 8

Java

/*Java program to insert element at a given location*/
//Save it as InsertElementGivenLocation.java

import java.io.*;
import java.util.Scanner;

public class InsertElementGivenLocation {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
        
        /* Declare array of larger size so that memory will be 
           available for element to be inserted */
        
        int arr[] = new int[100];

        System.out.println("Enter the size of array : ");
        int n = scanner.nextInt();

        System.out.println("Enter the elements of the array : ");
        for (int i = 0; i < n; i++) {
            arr[i] = scanner.nextInt();
        }
        
        System.out.println("Enter the position where elements to be entered : ");
        int pos = scanner.nextInt();
        
        System.out.println("Enter the element to be entered : ");
        int num = scanner.nextInt();
        
        
        /* Execute a loop to move all elements right by 1 position having 
           index greater than position where to insert element */
        
        for(int i=n-1;i>=pos;i--) {
            arr[i+1] = arr[i];
        }
        
        // Insert element at given position
        arr[pos] = num;
        
        // Finally print new array after insertion of new element
        System.out.println("The new array is : ");
        for(int i=0;i<=n;i++) {
            System.out.print(arr[i]+" ");
        }
    }
}

Input:
Enter the size of array : 
4
Enter the elements of the array : 
6
4
2
8
Enter the position where elements to be entered : 
2
Enter the element to be entered : 
7

Output:
The new array is : 
6 4 7 2 8

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