# Java Program to Find Sum of Elements of an Array

• 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
```

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