- How to add all elements of an array using loop in Java.
- Write a Java program to calculate sum of all array elements.

Given an array of N integers. We have to find the sum of all elements of array from index 0 to N-1.

Input Array 3 7 2 9 4 10 11 0 -1 Sum of Array Elements 45

**Algorithm to find sum of all array elements**

*Let inputArray is an integer array having N elements.*

- Declare an integer variable 'sum' and initialize it to 0. We will use 'sum' variable to store
**sum of elements of array**. - Using for-each loop, we will traverse inputArray and add each element to sum variable.
- After termination of for-each loop, "sum" variable will contain the
**sum of all array elements**.

## Java program to add all elements of an array

package com.tcc.java.programs; import java.util.*; public class ArrayElementSum { public static void main(String args[]) { int count, sum = 0, i; int[] inputArray = new int[500]; Scanner in = new Scanner(System.in); System.out.println("Enter number of elements"); count = in .nextInt(); System.out.println("Enter " + count + "elements"); for (i = 0; i < count; i++) { inputArray[i] = in .nextInt(); } for (int num: inputArray) { sum = sum + num; } System.out.println("Sum of all elements = " + sum); } }Output

Enter number of elements 5 Enter 5elements 3 8 1 7 2 Sum of all elements = 21