HackerRank Day 0: Data Types 10 days of javascript solution

In this Day 0: Data Types 10 days of javascript code problem you have given a Variables named firstInteger, firstDecimal, and firstString are declared for you in the editor below. You must use the + operator to Convert secondInteger to an integer (Number type), then sum it with firstInteger and print the result on a new line using console.log. and then Convert secondDecimal to a floating-point number (Number type), then sum it with firstDecimal and print the result on a new line using console.log. also, Print the concatenation of firstString and secondString on a new line using console.log. Note that firstString must be printed first. 

HackerRank Day 0: Data Types problem solution in JavaScript programming.

'use strict';

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(string => {
        return string.trim();
    });
    
    main();    
});

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

/**
*   The variables 'firstInteger', 'firstDecimal', and 'firstString' are declared for you -- do not modify them.
*   Print three lines:
*   1. The sum of 'firstInteger' and the Number representation of 'secondInteger'.
*   2. The sum of 'firstDecimal' and the Number representation of 'secondDecimal'.
*   3. The concatenation of 'firstString' and 'secondString' ('firstString' must be first).
*
*	Parameter(s):
*   secondInteger - The string representation of an integer.
*   secondDecimal - The string representation of a floating-point number.
*   secondString - A string consisting of one or more space-separated words.
**/
function performOperation(secondInteger, secondDecimal, secondString) {
    // Declare a variable named 'firstInteger' and initialize with integer value 4.
    const firstInteger = 4;
    console.log(firstInteger + parseInt(secondInteger));
    
    // Declare a variable named 'firstDecimal' and initialize with floating-point value 4.0.
    const firstDecimal = 4.0;
    console.log(firstDecimal + parseFloat(secondDecimal))
    
    // Declare a variable named 'firstString' and initialize with the string "HackerRank".
    const firstString = 'HackerRank ';
    console.log(firstString + secondString)
    
    // Write code that uses console.log to print the sum of the 'firstInteger' and 'secondInteger' (converted to a Number        type) on a new line.
    
    
    // Write code that uses console.log to print the sum of 'firstDecimal' and 'secondDecimal' (converted to a Number            type) on a new line.
    
    
    // Write code that uses console.log to print the concatenation of 'firstString' and 'secondString' on a new line. The        variable 'firstString' must be printed first.
    
}


function main() {
    const secondInteger = readLine();
    const secondDecimal = readLine();
    const secondString = readLine();
    
    performOperation(secondInteger, secondDecimal, secondString);
}