Programming Fundamentals for Beginners

Primitive Types and Variables

Integral Types Table

C# Type	.NET Framework Type	Size [bytes]	Size [bits]	Signed	Range	Suffix	Default
byte	System.Byte	1	8	no	0 to 255		0
sbyte	System.SByte	1	8	yes	-128 to 127		0
char	System.Char	2	16	no	U+0000 to U+ffff		'\0'
short	System.Int16	2	16	yes	-32,768 to 32,767		0
ushort	System.UInt16	2	16	no	0 to 65,535		0
int	System.Int32	4	32	yes	-2,147,483,648 to 2,147,483,647		0
uint	System.UInt32	4	32	no	0 to 4,294,967,295	U or u	0
long	System.Int64	8	64	yes	-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807	L or l	0L
ulong	System.UInt64	8	64	no	0 to 18,446,744,073,709,551,615	UL or ul	0

Floating-Point Types Table

C# Type	.NET Framework Type	Size [bytes]	Size [bits]	Signed	Range	Precision	Suffix	Default
float	System.Single	4	32	yes	±1.5e-45 to ±3.4e38	7 digits	F or f	0.0F
double	System.Double	8	64	yes	±5.0e-324 to ±1.7e308	15-16 digits	D or d	0.0D

Decimal Type Table

C# Type	.NET Framework Type	Size [bytes]	Size [bits]	Signed	Range	Precision	Suffix	Default
decimal	System.Decimal	16	128	yes	±1.0e-28 to ±7.9e28	28-29 significant digits	M or m	0.0M

Boolean Type Table

C# Type	.NET Framework Type	Size [bytes]	Size [bits]	Range	Default
bool	System.Boolean	1	8	true or false	false