Java Program To Find Sum of Elements in Long Array

Problem Statement :

 In this challenge, you are required to calculate and print the sum of the elements in an array, keeping in mind that some of those integers may be quite large.

Function Description

It must return the sum of all array elements.

aVeryBigSum has the following parameter(s):

• int ar[n]: an array of integers.

Return

• long: the sum of all array elements

Input Format

The first line of the input consists of an integer n.
The next line contains n space-separated integers contained in the array.

Output Format

Return the integer sum of the elements in the array.

Sample Input

5
1000000001 1000000002 1000000003 1000000004 1000000005

Output

5000000015

Program :

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;

public class Solution {

    // Complete the aVeryBigSum function below.
    static long aVeryBigSum(long[] ar) {
        int length=ar.length;
        long sum=0;
        for(int i=0;i<ar.length;i++){
            sum += ar[i];
        }
            return sum;
    }

    private static final Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) throws IOException {
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        int arCount = scanner.nextInt();
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");

        long[] ar = new long[arCount];

        String[] arItems = scanner.nextLine().split(" ");
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");

        for (int i = 0; i < arCount; i++) {
            long arItem = Long.parseLong(arItems[i]);
            ar[i] = arItem;
        }

        long result = aVeryBigSum(ar);

        bufferedWriter.write(String.valueOf(result));
        bufferedWriter.newLine();

        bufferedWriter.close();

        scanner.close();
    }
}