simple-array-sum.java

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

public class Solution {

    /*
     * Complete the simpleArraySum function below.
     */
    static int simpleArraySum(int[] ar) {
        /*
         * Write your code here.
         */

        // ar = 1,2,3

        // intialize a variable with intial value as 0
        // iterate through the array
        // add each element's value to this variable
        // assign the above value each time to variable
        // return the final value of variable

        int sum = 0;
        for(int i=0; i<ar.length; i++){
           sum = sum + ar[i];
           // 1st time sum - 1
           // 2nd time sum - 3
           // 3rd time sum - 6
        }
        return sum; // 6
    }

    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 = Integer.parseInt(scanner.nextLine().trim());

        int[] ar = new int[arCount];

        String[] arItems = scanner.nextLine().split(" ");

        for (int arItr = 0; arItr < arCount; arItr++) {
            int arItem = Integer.parseInt(arItems[arItr].trim());
            ar[arItr] = arItem;
        }

        int result = simpleArraySum(ar);

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

        bufferedWriter.close();
    }
}