Given an array, the task is to increment each element of the array by 1. All elements of the incrementing array need to be fully traversed. The optimization method to complete a given task has O(N) time complexity.

Examples:

Input : arr1[] = {50, 25, 32, 12, 6, 10, 100, 150}
Output: arr1[] = {51, 25, 33, 13, 7, 11, 101, 151}

Input : arr2[] = {3, 6, 8, 12, 45}
Output: arr2[] = {4, 7, 9, 13, 46}

1. with pre-defined values:

First, initialize the array arr[] with a predefined value, and then calculate the length of the array. Then use the loop, with the help of the for loop, perform the operation that increments the values ??one by one. After that, the results of the above operations will be stored in the array, and then will be output and displayed one by one with the help of the for loop.

// Java Program to Increment All
// Element of an Array by One
public class Increment {
	public static void main(String[] args)
	{
		// assigning values in array
		int[] arr = { 50, 25, 32, 12, 6, 10, 100, 150 };
		
		// finding the length of the array
		// and assigning it to the variable n
		int n = arr.length;

		System.out.println(
			"******* BEFORE INCREMENT *******");
		
		// printing the elements of array
		// before performing operation
		for (int i = 0; i < n; i++) {
			System.out.print(arr[i]);
			System.out.print(" ");
		}

		// incrementing the values of array
		// by 1 with the help of loop
		for (int i = 0; i < n; i++) {
			arr[i] = arr[i] + 1;
		}

		System.out.println(" ");
		
		// elements of the array after increment
		System.out.println(
			"******* AFTER INCREMENT *******");
		
		// printing the elements of array after operation
		for (int i = 0; i < n; i++) {
			System.out.print(arr[i]);
			System.out.print(" ");
		}
	}
}

Output

******* BEFORE INCREMENT *******
50 25 32 12 6 10 100 150  
******* AFTER INCREMENT *******
51 26 33 13 7 11 101 151 

Time Complexity: O(N), Where N is the size of an array

2. with user-defined values:

Initialize the array arr[] with a user-defined value, that is, the value of the array will be given by the user, and then the length of the array should be calculated. Then use the loop to perform the operation of incrementing the values ??one by one with the help of the for loop. After that, the results of the above operations will be stored in an array, and then will be output and displayed one by one with the help of the for loop.

// Java Program to Increment All
// Element of an Array by One
import java.util.Scanner;

public class Increment2 {

	public static void main(String[] args)
	{
		System.out.println(
			"Enter the length of the array: ");
		
		// The object of scanner class is created
		// in order to take the input from user
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		
		// Initializing the array of size that
		// is given by the user
		int[] arr = new int[n];
		
		// Calculating the length of the array
		int l = arr.length;

		System.out.println(
			"Enter the values you want to insert in array: ");
		
		// Taking the values from user
		for (int i = 0; i < l; i++) {
			arr[i] = sc.nextInt();
		}

		System.out.println(
			"******* BEFORE INCREMENT *******");
		
		// The elements of array before increment
		for (int i = 0; i < l; i++) {
			System.out.print(arr[i]);
			System.out.print(" ");
		}

		// Incrementing the values of the array by 1
		for (int i = 0; i < l; i++) {
			arr[i] = arr[i] + 1;
		}

		System.out.println(" ");
		System.out.println(
			"******* AFTER INCREMENT *******");
		// Elements of array after increment
		for (int i = 0; i < l; i++) {
			System.out.print(arr[i]);
			System.out.print(" ");
		}
	}
}