10 Days of JavaScript

## DAY 1:Program 1: we're discussing data types with different data types and operation. 

'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;

    // Declare a variable named 'firstDecimal' and initialize with floating-point value 4.0.
    const firstDecimal = 4.0;

    // Declare a variable named 'firstString' and initialize with the string "HackerRank".
    const firstString = 'HackerRank ';

    // Write code that uses console.log to print the sum of the 'firstInteger' and 'secondInteger' (converted to a Number        type) on a new line.

    console.log(firstInteger+(+secondInteger))


    // Write code that uses console.log to print the sum of 'firstDecimal' and 'secondDecimal' (converted to a Number            type) on a new line.

    console.log(firstDecimal+(+secondDecimal));

    // 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.

    console.log(firstString+secondString);
}


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

    performOperation(secondInteger, secondDecimal, secondString);
}

Program 2: /**
*   A line of code that prints "Hello, World!" on a new line is provided in the editor. 
*   Write a second line of code that prints the contents of 'parameterVariable' on a new line.
*
*   Parameter:
*   parameterVariable - A string of text.
**/
function greeting(parameterVariable) {
    // This line prints 'Hello, World!' to the console:
    console.log('Hello, World!');
    //parameterVariable = 'Welcome to 10 Days of JavaScript!';
    // Write a line of code that prints parameterVariable to stdout using console.log:
    console.log(parameterVariable);
}
function main() {
    const parameterVariable = readLine();

    greeting(parameterVariable);
}