c# how to add a million int character, how to add this without getting an error and getting the exact sum?

Question

how to add this without getting an error and getting the exact sum?

int a = 10000000000000; int b = 10000000000000; int c = a + b; Messagebox.Show(Convert.ToString(c));

Use long instead of int. And if that's not enough, there's System.Numerics.BigInteger — Vilx-
– Vilx-, Commented Jan 20, 2021 at 12:49
In addition to BigInteger, you can take a look at C# - Data Types (TutorialPoints) and Integral numeric types (C# reference) and Floating-point numeric types (C# reference). — user12031933
– user12031933, Commented Jan 20, 2021 at 13:10
Does this answer your question? Arbitrarily large integers in C# — Franz Gleichmann
– Franz Gleichmann, Commented Jan 20, 2021 at 14:27

godot · Accepted Answer · 2021-01-20 13:30:30Z

10000000000000 is a higher than int could hold. If you check the max value of int int.MaxValue you get 2147483647. So you should use long there and everything would be ok:

long a = 10000000000000; long b = 10000000000000; long c = a + b; Console.WriteLine(Convert.ToString(c));

Range of int is [-2147483648,2147483647]
Range of long is [-9223372036854775808,9223372036854775807]

Mark · Accepted Answer · 2021-01-20 15:35:35Z

3

A signed int can only represent numbers between -2,147,483,648 and 2,147,483,647(https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/builtin-types/integral-numeric-types).

You can represent larger range of numbers by using long instead of int.

edited Jan 20, 2021 at 15:35

Mark

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answered Jan 20, 2021 at 12:48

Roger

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2 Comments

Crys Over a year ago

i want to add numbers larger than long. how should i do it?

user12031933 Over a year ago

@Crys Use decimal else System.Numerics.BigInteger as suggested by @.Vilx: does it fit?

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