Datatypes
Native datatypes
|
Datatype
|
Description
|
Default value
|
Size in memory
|
|---|
Boolean
|
True or false.
|
FALSE
|
1 byte
|
Byte
|
0...255
|
0
|
1 byte
|
Short
|
-32.768...+32.767
|
0
|
2 bytes
|
Integer
|
-2.147.483.648...+2.147.483.647
|
0
|
4 bytes
|
Long
|
-9.223.372.036.854.775.808...+9.223.372.036.854.775.807
|
0
|
8 bytes
|
Single
|
Like the float datatype in C.
|
0.0
|
4 bytes
|
Float
|
Like the double datatype in C.
|
0.0
|
8 bytes
|
Date
|
Date and time, each stored in an integer.
|
NULL
|
8 bytes
|
String
|
A variable length string of characters.
|
NULL
|
4 bytes on 32 bits systems,
8 bytes on 64 bits systems.
|
Variant
|
Any datatype.
|
NULL
|
12 bytes on 32 bits systems,
16 bytes on 64 bits systems.
|
Object
|
Anonymous reference to any object.
|
NULL
|
4 bytes on 32 bits systems,
8 bytes on 64 bits systems.
|
Pointer
|
A memory address.
|
0
|
4 bytes on 32 bits systems,
8 bytes on 64 bits systems.
|
Arrays
Each native datatype has an associated array datatype whose name is the name of the native datatype followed by square brackets:
Boolean[],
Byte[],
Short[],
Integer[],
Single[],
Float[],
String[],
Date[],
Variant[],
Pointer[],
and
Object[].
Moreover, any datatype can have an array equivalent. For example:
String[][] for an array of string arrays ;
Collection[] for an array of collections ; and so on.
The class of non-native datatype arrays is created on the fly by the interpreter.
See also