Deletion

Deletion is the operation used to delete the element from the given Array.

It is done in two ways

• By Index number
• By Element

1.By Index Number: Deletion is done through the index number.

Program Solution :

package QuipoHouse.ArrayOperations;

import java.util.Scanner;

public class Deletion {

	public static void main(String[] args) {
		int arr[] = new int[20];
		int i;
		// Scanner class for taking values
		Scanner sc = new Scanner(System.in);
		System.out.println("Enter the num of element of Array less than 20:");
		int n = sc.nextInt();
		// Entering n element in Array
		System.out.println("Enter the element in Array:");
		for (i = 0; i < n; i++) {
			arr[i] = sc.nextInt();
		}
		System.out.println("Enter the Pos where element is to be deleted:");
		int pos = sc.nextInt();

		// Shifting of Array
		for (i = pos - 1; i <= n - 1; i++) {
			arr[i] = arr[i + 1];
		}
		n--; // Decreasing the Size after shifting

		// Printing the updated Array
		System.out.println("---Element after Deleted---");
		for (i = 0; i < n; i++) {
			System.out.print(arr[i] + " ");
		}

	}
}

Output:

Enter the num of element of Array less than 20:
5
Enter the element in Array:
1
2
3
4
5
Enter the Pos where element is to be deleted:
5
---Element after Deleted---
1 2 3 4 

2.By Element:

Program Solution :

package QuipoHouse.ArrayOperations;

import java.util.Scanner;

public class Deletion {

	public static void main(String[] args) {
		int arr[] = new int[20];
		int i;
		
		// Scanner class for taking values
		Scanner sc = new Scanner(System.in);
		System.out.println("Enter the num of element of Array less than 20:");
		int n = sc.nextInt();
		
		// Entering n element in Array
		System.out.println("Enter the element in Array:");
		for (i = 0; i < n; i++) {
			arr[i] = sc.nextInt();
		}
		System.out.println("Enter the element to be deleted:");
		int data = sc.nextInt();

		// Shifting of Array
		for (i = 0; i < n; i++) {
			if (arr[i] == data)
				for (int j = i; j < n; j++) {
					arr[j] = arr[j + 1];
				}
		}
		n--;      // Decreasing the Size after shifting
		
		// Printing the updated Array
		System.out.println("---Element after Deleted---");
		for (i = 0; i < n; i++) {
			System.out.print(arr[i] + " ");
		}

	}
}

Output:

Enter the num of element of Array less than 20:
5
Enter the element in Array:
4
9
6
5
2
Enter the element to be deleted:
6
---Element after Deleted---
4 9 5 2