arraySum.js

"use strict";

const fs = require("fs");

process.stdin.resume();
process.stdin.setEncoding("utf-8");

let inputString = "";
let currentLine = 0;

process.stdin.on("data", inputStdin => {
  inputString += inputStdin;
});

process.stdin.on("end", _ => {
  inputString = inputString
    .trim()
    .split("\n")
    .map(str => str.trim());

  main();
});

function readLine() {
  return inputString[currentLine++];
}

/*
 * Complete the simpleArraySum function below.
 */
function simpleArraySum(ar) {
  /*
   * Write your code here.
   */
  let sum = 0;
  for (let i = 0; i < ar.length; i++) {
    sum = sum + ar[i];
  }
  return sum;
}

function main() {
  const ws = fs.createWriteStream(process.env.OUTPUT_PATH);

  const arCount = parseInt(readLine(), 10);

  const ar = readLine()
    .split(" ")
    .map(arTemp => parseInt(arTemp, 10));

  let result = simpleArraySum(ar);

  ws.write(result + "\n");

  ws.end();
}