ThinBASIC Core Language > Data types and variables

Numeric variables

The following numeric data types are supported:

Group	Data type	Bits	Bytes	Range from	Range to	Digits of precision
Integer data types	BYTE	8	1	0	255	n/a
	INTEGER	16	2	-32768	32767	n/a
	WORD	16	2	0	65535	n/a
	DWORD	32	4	0	4294967295	n/a
	LONG	32	4	-2147483648	2147483647	n/a
	QUAD	64	8	-9.22*(10^18)	+9.22*(10^18)	n/a

Floating point data types	SINGLE	32	4	8.43*(10^-37)	3.40*(10^38)	6
	DOUBLE	64	8	-4.19*(10^-307)	1.79*(10^308)	16
	EXTENDED (EXT)	80	10	3.4*(10^-4932)	1.2*(10^4932)	18
	CURRENCY	64	8	-9.22*(10^14)	+9.22*(10^14)	4

Restrictions

1.thinBasic perform all internal numeric calculations using EXTENDED (abbreviated EXT) data type.

2.due to lack of precision (only 6 digits), we suggest to use SINGLE data type only when interfacing to external libraries that explicitly ask for SINGLE parameters passed by reference.

3.Numeric data type is an alias of EXT (Extended)

Numeric alias

In order to improve possibility to convert source code from/to other programming languages, thinBasic supports alias for floating point and integer numeric data types:

Alias	Equivalent to thinBasic data type
Int16	INTEGER
UInt16	WORD
UInt32	DWORD
Int32	LONG
Int64	QUAD
LongLong	QUAD
Large_Integer	QUAD

Float32	SINGLE
Float64	DOUBLE
Float80	EXTENDED (EXT)
DWordLong	QUAD