HackerRank Day 1 - C# "Data Types"

HackerRank Day 1 - C# "Data Types"

using System;
using System.Collections.Generic;
using System.IO;

class Solution {
    static void Main(String[] args) {
        int i = 4;
        double d = 4.0;
        string s = "HackerRank ";

        string prefix = "HackerRank ";
        // Declare second integer, double, and String variables.
        int intValue; double doubleValue; string stringValue;
        // Read and save an integer, double, and String to your variables.
        intValue = int.Parse(Console.ReadLine());
        doubleValue = double.Parse(Console.ReadLine());
        stringValue = Console.ReadLine();
        // Print the sum of both integer variables on a new line.
        Console.WriteLine(intValue + i);
        // Print the sum of the double variables on a new line.
        Console.WriteLine($"{doubleValue + d:F1}");
        // Concatenate and print the String variables on a new line
        // The 's' variable above should be printed first.
        Console.WriteLine($"{prefix}{stringValue}");

    }
}