Randomize Statement
Initialises the random-number generator used by the Rnd function.
Syntax:
Randomise [Number]
Parameters:
Number: Any integer value. Used as seed to initialise the random-number generator. Equal seeds result in equal random-number sequences by the Rnd function. If the parameter is omitted, the Randomize statement will be ignored.
Unless a predictable sequence of numbers is desired, there is no need to use the Randomize statement, as the random-number generator will be initialised automatically at first use – it will be seeded using a system-provided random-number generator that produces uniformly-distributed, non-deterministic random numbers. If no such generator is available on the system, the system time will be used as seed.
The Randomize statement affects BASIC's Rnd function only. Other random-number generators (for example the Calc's RAND() function, etc.) are not affected by it.
Error codes:
5 Invalid procedure call
Example:
Sub ExampleRandomize
Dim iCount As Integer, iVar As Integer, sText As String
Dim iSpectral(10) As Integer
Randomize 2^14-1
For iCount = 1 To 1000
iVar = Int(10 * Rnd) ' Range from 0 to 9
iSpectral(iVar) = iSpectral(iVar) +1
Next iCount
sText = " | "
For iCount = 0 To 9
sText = sText & iSpectral(iCount) & " | "
Next iCount
MsgBox sText,0,"Spectral Distribution"
End Sub