Question

For C#

I'm trying to find what the best variable is to print out a large (trillions) number to 2 decimal places. However, I can't find the variable that works without rounding the second decimal. My best option right now seems to be the double variable, but it is rounding the second decimal.

Answer 1

Well, if you add a reference to system.numerics and then add using system.numerics to the list of using statements, you could use BigInteger @int = new BigInteger(); and then assign a value to "int".

Answer 2

I'm not sure what you mean with the system.numerics.

My code looks like this right now:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication101
{
class Program
{
static void Main(string[] args)
{
double i = 16741848020477.05;

Console.WriteLine(i);
}
}
}

Answer 3

The .05 keeps changing to .1

Answer 4

I'll make a screenshot.

Answer 5

Add the reference as shown in the picture

Answer 6

I can't seem to find it on my VS

Answer 7

Also, would double be the correct variable to use? Or would something like decimal would be?

Answer 8

Basically, I'm trying to find the best data type to use for that specific number.

Answer 9

Well, let me go through the list of variables in VS really quick and see what the best one would be.

Answer 10

Thank you. I'm confused since the decimal keeps changing.

Answer 11

I believe the variables are: short, int, long, byte, ushort, uint, ulong, float, double, decimal, char, string, bool

Answer 12

Well, you could always make it a string, unless you need to use it later in some sort of equation or something.

Answer 13

Yeah, I was thinking about that. I'm not sure if I can though since I was told it needed to be a data type. However, I can't seem to find the data type that prints it correctly

Answer 14

Also, when I tried making it anything other than a double or string, it told me it couldn't convert a double to whatever I was trying to use. So, I guess string would maybe be the best choice.

Answer 15

Hmmm, I see. Thank you, I'll try and go with string.

Answer 16

Okay, but I'm going to see if I can find a way to prevent it from rounding in case strings aren't acceptable.

Answer 17

Thank you, I appreciate all the help for this

Answer 18

The question was this:

If you were tasked with keeping track of the US Government's national debt to the nearest penny, what data type would you use? Explain how you decided this was the best choice.

You think string would best fit as the answer?

Answer 19

Probably. Because I couldn't find another way to do it.

Answer 20

I see, thank you

Answer 21

So, was I right? :3

Answer 22

Haha, haven't gotten a response yet. I believe so though :P