Java Source code example: How to Add Numbers in an Array using For Loop

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This is a Java source code on how to add numbers inside an array using for loop version, this program has also another version on how to add numbers in an array using recursion, if you want to see it too, here is the link to view the page..

Java Source codes on Adding numbers inside the Array Using Recursion

In comparison of the other version, you would discover that adding numbers inside an array using for loop is easier to understand and the code is easy to trace. Although both of them has its own advantages, it is really important to know the depth of recursion for other complicated program can only be easily solved using recursion and much complicated on for loop, the best example is the tower of hanoi, it was program using recursion. So, to know how recursion works you can surf my other program which uses recursion, Below is the java source code on adding numbers in an array using for loop.

Java Source code: How to Add Numbers inside an Array using For Loop

//main class
import java.util.Scanner;
public class Main
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
System.out.print(“Enter the size of the input you want to enter: “);
int size = input.nextInt();
int[] numArr = new int[size];
int sum=0;
System.out.print(“Enter “+ size +” numbers: “);
for(int i=0; iSample Output:

Enter the size of the input you want to enter: 5

Enter 5 numbers: 34 2 5 3 6

The sum of the numbers is: 50

If you want to make a method and segregate the implementation of sum for the sake of practice in Object Oriented Programming, just simply code it this way.

//java class
public class ArraySum
{
public int sumOfArray(int[] array)
{
int sum = 0;

How to Run Java Code Online

Here is the sample output for the code above.

Sample Output:

Enter the size of the input you want to enter: 5

Enter 5 numbers: 2 5 3 7 25

The sum of the numbers is:42

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