Type-1: 

Here's a Java program to find the sum of all elements in an integer array, along with an explanation of each step:


public class ArraySum { 
public static void main(String[] args) { 
// Step 1: Define an integer array with some elements

        int[] numbers = { 10, 20, 30, 40, 50 }; 
// Step 2: Initialize a variable to store the sum of all elements 
int sum = 0; 
// Step 3: Calculate the sum of all elements in the array 
// Using a for-each loop to iterate through each element in the array 
for (int number : numbers) { 
// Add the current element (number) to the sum variable 
 sum += number; 
 } 
// Step 4: Print the sum of the elements 
 System.out.println("The sum of the elements in the array is: " + sum);
 }
 }

Explanation of each step:

  1. We start by defining an integer array named numbers. In this example, we have an array with elements {10, 20, 30, 40, 50}. You can modify this array to have any set of integer elements.
  2. Next, we initialize an integer variable sum to store the sum of all elements in the array. We set it to zero initially, as we haven't calculated the sum yet.
  3. We use a for-each loop to iterate through each element of the numbers array. The for-each loop simplifies the process of iterating through arrays and collections. For each iteration, the variable number will hold the value of the current element.
  4. Inside the loop, we add the current element (represented by number) to the sum variable. This step is repeated for each element in the array, effectively summing up all the elements.
  5. Finally, after the loop has finished, we print the sum of the elements using System.out.println(). The output will display the sum of all elements in the array.
Type-2:

There are several ways to find the sum of all elements in an integer array in Java. One alternative method is to use a traditional for loop instead of a for-each loop. 

Here's the Java program with the traditional for loop:


public class ArraySum { 
public static void main(String[] args) { 
// Step 1: Define an integer array with some elements 
int[] numbers = { 10, 20, 30, 40, 50 }; 
// Step 2: Initialize a variable to store the sum of all elements 
int sum = 0; 
// Step 3: Calculate the sum of all elements in the array using a traditional for loop 
for (int i = 0; i < numbers.length; i++) {
// Add the current element (numbers[i]) to the sum variable

            sum += numbers[i]; 
 } 
// Step 4: Print the sum of the elements 
 System.out.println("The sum of the elements in the array is: " + sum); 
 } 
}


Explanation of the alternative method:
  1. We start by defining the integer array named numbers, just like in the previous example.
  2. Next, we initialize the integer variable sum to store the sum of all elements, as before.
  3. Instead of using a for-each loop, we use a traditional for loop to iterate through the array. The loop variable i starts from 0 and runs until i < numbers.length, where numbers.length gives the total number of elements in the array.
  4. Inside the loop, we add the current element (represented by numbers[i]) to the sum variable. This step is repeated for each element in the array, effectively summing up all the elements.
  5. Finally, after the loop has finished, we print the sum of the elements using System.out.println().


Both the for-each loop and traditional for loop achieve the same result of calculating the sum of elements in the array. You can use either of the methods based on your preference or specific use case.