C# Integer Variable Types

By Bill Sempf, Charles Sphar, and Stephen R. Davis

Part of the C# 2010 All-In-One For Dummies Cheat Sheet

C# integer variables come in a variety of types and ranges. The following table sorts out the C# integer variables so you’ll always know the range and size of each.

Type	Size (bytes)	Range	In Use
sbyte	1	–128 to 127	sbyte sb = -12;
byte	1	0 to 255	byte b = 12;
short	2	–32,768 to 32,767	short sn = -123;
ushort	2	0 to 65,535	ushort usn = 123;
int	4	–2,147,483,648 to 2,147,483,647	int n = 123;
uint	4	0 to 4,294,967,295	uint un = 123U;
long	8	–9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 — “a whole lot”	long l = 123L;
ulong	8	0 to 18,446,744,073,709,551,615	long ul = 123UL;