How to format whole numbers with .00 at the end

Question

I want to achieve the following: Whatever number may be printed to the console, it has to have 2 digits after the decimal mark. When the result is a decimal number, the program rounds it off to 2 digits after the decimal mark, so this is fine. The problem is, however, that whole numbers don't get .00 attached to them, i.e. 100 gets printed as 100, and not as 100.00 as I want it to. I've been struggling with this for quite a while so I any help will be highly appreciated.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TorrentPirate
{
    class Program
    {
        static void Main(string[] args)
        {     
           int megabytes = int.Parse(Console.ReadLine());        
           int cinemaPricePerMovie = int.Parse(Console.ReadLine());     
           int wifeSpendingHour = int.Parse(Console.ReadLine());
           TimeSpan time = TimeSpan.FromSeconds(megabytes/2);
           double downloadTime = time.TotalHours;
           double downloadPrice = wifeSpendingHour * downloadTime;
           int NumberOfMoviesDownloaded = megabytes / 1500;
           double cinemaPrice = NumberOfMoviesDownloaded * cinemaPricePerMovie;

            if (cinemaPrice >= downloadPrice)
            {
                downloadPrice = Math.Round(downloadPrice, 2);
                Console.WriteLine("{0} -> {1}lv", "mall", Convert.ToDecimal(downloadPrice));
                    }
            else
            {
                cinemaPrice = Math.Round(cinemaPrice, 2);
                Console.WriteLine("{0} -> {1}lv", "cinema", Convert.ToDecimal(cinemaPrice));
            }

        }
    }
}

`Console.WriteLine("{0} -> {1}lv", "mall", downloadPrice.ToString("#.##"));` — Marshal, Dec 23 '15 at 18:00
What is the minimum code to reproduce the issue? The code you posted seems more than necessary — Thomas Weller, Dec 23 '15 at 18:03

score 2 · Answer 1 · answered Dec 23 '15 at 18:02

2

Why not just display it as a string?

Console.WriteLine("{0} -> {1}lv", "mall", downloadPrice.ToString("#.##"));

answered Dec 23 '15 at 18:02

Lefka

633
6
20

This doesn't work. Try typing in the values 30000, 5, 50. – VaVa Dec 23 '15 at 19:02

sstan · Answer 2 · 2015-12-23T21:58:06.153

2

You can use .ToString("0.00"):

Console.WriteLine("{0} -> {1}lv", "mall", downloadPrice.ToString("0.00"));

Or, you can simply use the format specifier N2:

Console.WriteLine("{0} -> {1:N2}lv", "mall", downloadPrice);

See Standard Numeric Format Strings.

edited Dec 23 '15 at 21:58

answered Dec 23 '15 at 18:08

sstan

35,425
6
48
66

score 1 · Answer 3 · answered Dec 23 '15 at 18:02

1

Console.WriteLine("{0} -> {1}lv", "mall", downloadPrice.ToString("#.##"));

answered Dec 23 '15 at 18:02

casillas

16,351
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How to format whole numbers with .00 at the end

3 Answers3