Declares or redefines variables or arrays.
variable: Any variable or array name.
typename: Keyword that declares the data type of a variable.

Byte: Byte variable (0-255)
Boolean: Boolean variable (True, False)
Currency: Currency variable (Currency with 4 Decimal places)
Date: kuupäevamuutuja
Double: Double-precision floating-point variable (1,79769313486232 x 10E308 - 4,94065645841247 x 10E-324)
Integer: täisarvmuutuja (-32768 - 32767)
Long: pikk täisarvmuutuja (-2.147.483.648 - 2.147.483.647)
Object: Object variable (Note: this variable can only subsequently be defined with Set!)
Single: üksiktäpsusega ujukomamuutuja (3,402823 x 10E38 - 1,401298 x 10E-45).
String: maksimaalselt 64 000 ASCII-st koosnev stringmuutuja
Variant: Variant variable type (contains all types, specified by definition). If a type name is not specified, variables are automatically defined as Variant Type, unless a statement from DefBool to DefVar is used.
object: Universal Network object (UNO) object or ClassModule object instance.
char: Special character that declares the data type of a variable.

LibreOfficeDev BASICus pole muutujaid vaja selgesõnaliselt deklareerida, küll aga tuleb enne kasutamist deklareerida massiivid. Muutuja deklareerimiseks saab kasutada lauset Dim. Deklaratsioonide eraldamiseks kasuta koma. Muutujatüübi deklareerimiseks sisesta nime järele tüübideklaratsiooni märk või kasuta vastavat võtmesõna.
Declaration character |
Variable type name |
% |
Integer |
& |
Long |
! |
Single |
# |
Double |
$ |
String |
@ |
Currency |
array: Array declaration.

start, end: Numerical values or constants that define the number of elements (NumberElements=(end-start)+1) and the index range.
start and end can be numerical expressions if ReDim is applied at the procedure level.
LibreOfficeDev Basic toetab ühe- ja mitmemõõtmelisi massiive, mis on määratletud määratud muutujatüübiga. Massiivid on sobivad siis, kui programm sisaldab loendeid või tabeleid, mida soovid redigeerida. Massiivide eelis on see, et nende abil saab indeksite abil pöörduda üksikute elementide poole. Indeksid saab formuleerida arvavaldiste või muutujatena.
Arrays are declared with the Dim statement. There are multiple ways to define the index range:
Dim text(20) As String ' 21 elements numbered from 0 to 20
Dim value(5 to 25) As Integer ' 21 values numbered from 5 to 25
Dim amount(-15 to 5) As Currency ' 21 amounts (including 0), numbered from -15 to 5
REM Two-dimensional data field
Dim table$(20,2) ' 63 items; from 0 to 20 level 1, from 0 to 20 level 2 and from 0 to 20 level 3.
You can declare an array types as dynamic if a ReDim statement defines the number of dimensions in the subroutine or the function that contains the array. Generally, you can only define an array dimension once, and you cannot modify it. Within a subroutine, you can declare an array with ReDim. You can only define dimensions with numeric expressions. This ensures that the fields are only as large as necessary.