The different types of integers

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The different types of integers

Types of integers

Notes

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The different types of integers

Types of integers

Different types of integers are available in WLanguage

	Value included between

*Integer*	-2 x 10⁹ and 2 x 10⁹ (roughly) Example: i is int i = 5
*1-byte integer*	-128 and 127 (inclusive) Example: i is 1-byte int
*2-byte integer*	-32.768 and 32.767 (inclusive) Example: I is 2-byte int
*4-byte integer*	-2 x 10⁹ and 2 x 10⁹ (roughly) Example: i is 4-byte int
*8-byte integer*	-9 x 10¹⁸ and 9 x 10¹⁸ (roughly) Example: i is 8-byte int
*Unsigned integer*	0 and 4 x 10⁹ Example: i is unsigned int
*Byte*	0 and 255 (inclusive) This type is equivalent to the unsigned 1-byte integer. Example: i is byte
*Unsigned 1-byte integer*	0 and 255 (inclusive) Example: i is unsigned 1-byte int
*Unsigned 2-byte integer*	0 and 65.535 (inclusive) Example: i is unsigned 2-byte int
*Unsigned 4-byte integer*	0 and 4 x 10⁹(roughly) Example: i is unsigned 4-byte int
*Unsigned 8-byte integer*	0 and 18 x 10¹⁸ Example: i is unsigned 8-byte int
*System integer*	automatically adapts to the size supported by the compilation mode (4 bytes for a program compiled in 32 bits, 8 bytes for a program compiled in 64 bits). Example: i is system int

The exact values for these different types of integers can be found in the Limits.wl file found in the Personal\External subdirectory of the setup directory of WINDEV, WEBDEV and WINDEV Mobile.

Remark: All the advanced types (different from the "Integer" type) are recommended when using the Windows APIs.

Notes

Default value

An "Integer" variable that is declared but not initialized is equal to 0.

Hexadecimal value

To enter an hexadecimal value in the code, the hexadecimal value must be prefixed by "0x".

MyVariable is int
MyVariable = 0x4D5

Remark: The '_' character can be used as block separator in the hexadecimal numbers. The blocks can have a size equal to 2, 4 or 8 characters long.
Example:

Nb1 is int = 0x_12_15_A4_BC
Nb2 is int = 0x_CD4A_DE58

Thousand separator

You can use spaces and underscore characters to separate thousands in numbers. For example:

num1 is int
num1 = 123 456
let num2 = 246_789

Differences between WINDEV 5.5 and WINDEV 27

The types of integers have been modified between WINDEV 5.5 and WINDEV 27:

Type of integers in WINDEV 5.5	Type of integers in WINDEV 27

Integer	2-byte integer
Unsigned integer	Unsigned 2-byte integer
Long integer	4-byte integer
Short integer	Unsigned 1-byte integer

In WINDEV 5.5, integers were 2-byte integers by default. Since the versions 7.x, integers are 4-byte integers by default.