Function Statement

ආපසු ලබා දෙන අගයක් තීරණය කිරීමට ප්‍රකාශනයක් ලෙස භාවිතා කල හැකි උප ක්‍රම චර්යාවක් අර්ථ දක්වයි.

note

Sub or Function statements are similar methods, without distinction. They receive parameters by reference allowing them to be modified. LibreOffice Basic compiler accepts their respective syntax to be used interchangeably.


Syntax:

Function Statement diagram


  [Private | Public] Function Name[char] (argument1 [As Type][, argument2[char][,...]]) [As typename]
          statements
      [Exit Function]
          statements
  End Function

Parameters:

scope: Function default scope is Public. A Private scope denotes a module internal routine, not intended to be used from other modules.

name: Name of the subroutine to contain the value returned by the function.

arguments: Parameters to be passed to the subroutine.

argument fragment

argument fragment


      {[Optional [ByRef|ByVal]]|ParamArray} argument {{As typename|char}[ = expression]|[()]As Variant}
Parameters

Optional: The argument is not mandatory.

ByRef: The argument is passed by reference. ByRef is the default.

ByVal: The argument is passed by value. Its value can be modified by the called routine.

char: Type declaration character.

typename: Primitive data type name. Library or module defined types can also be specified.

= expression: Specify a default value for the argument, matching its declared type. Optional is necessary for each argument specifying a default value.

ParamArray: Use ParamArray when the number of parameters is undetermined. A typical scenario is that of a Calc user-defined function. Using ParamArray should be limited to the last argument of a routine.

tip

UsingParamArray or = expression require Option Compatible to be placed before the executable program code in a module.


warning

When using Option VBASupport 1, Optional arguments with no default value (= expression) are initialized according to their data type, except if Variant.


typename fragment

primitive data types fragment


      {Boolean|Byte|Currency|Date|Double|Integer|Long|Object|Single|String|Variant}
char fragment

type declaration characters


      { % | & | ! | # | $ | @ }

Examples:


Sub ExampleExit
Dim sReturn As String
Dim sListArray(10) As String
Dim siStep As Single
    siStep = 0 සිට 10 දක්වා REM පරීක්ෂණ දත්ත සමඟ අරාව පුරවන්න
        sListArray(siStep) = chr$(siStep + 65)
        MsgBox sListArray(siStep)
    Next siStep
    sReturn = LinSearch(sListArray(), "B")
    Print sReturn
End Sub
 
Function LinSearch( sList(), sItem As String ) As Integer
Dim iCount As Integer
REM Linsearch TextEntryක් සඳහා TextArray:sList() සොයයි :
REM ආපසු ලබා දෙන අගය ප්‍රවේශයේ සුචිය හෝ 0 (කිසිවක් නැත) වේ
    For iCount=1 To Ubound( sList() )
        If sList( iCount ) = sItem Then
            REM sItem සඳහා ඉවත්වීමක් හමුවිය
        End If
    Next iCount
    If iCount = Ubound( sList() ) Then iCount = 0
    LinSearch = iCount
End Function

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