Data Types in F#

F# supports mainly 4 types of data types.

Types	Data Types
Primitive data types	char, byte, bool, int, float
Derived data types	class, array, list, records, sequence
Enumeration	enum
Unit type	it is used if other data types are not specified.

Primitive data types are integral and floating type based. F# supports both signed and unsigned literals.

Data Types	Description	Range	Suffix Or Prefix
bool	Possible values are true and false	NA
sbyte	signed 8-bit integer	-128 to 127	y
byte	unsigned 8-bit natural number	0 to 255	uy
int16	signed 16-bit integer	-32768 to 32767	s
uint16	unsigned 16-bit natural number	0 to 65535	us
int or int32	signed 32-bit integer	-2³¹+1 to 2³¹-1	us
uint or uint32	unsigned 32-bit natural number	0 to 4,294,967,295	u or ui
nativeint	Native pointer as a signed natural number		n
unativeint	native pointer as an unsigned natural number		un
int64	signed 64-bit integer	-2⁶³+1 to 0 to 2⁶³-1	un
uint64	unsigned 64-bit natural number	0 to 2⁶³-1	ul
single or float32	32-bit floating point number		F or f
float; double	64-bit floating point number		none
bigint	integer not limited to 64-bit representation		l
decimal	fractional number represented as a fixed point or rational number		M or m
Char	Unicode character		none
String	Unicode string		None
Byte	Ascii character		B
Byte[]	Ascii string		B
unit	Indicates the absence of an actual value. The type has only one formal value which is denoted (). The unit value, (), is often used as a placeholder where a value is needed but no real value is available.
Void	Indicates no type or value.
String or byte[]	Verbatim string		@prefix