Rnd Function

0 から 1 の間の乱数を返します。

構文:

Rnd [(Expression)]

戻り値:

倍精度

パラメーター:

Expression: Has no effect, is ignored if provided.

The Rnd function returns decimal fractions ranging from 0 (included) to 1 (excluded) according to a uniform distribution. It uses the Mersenne Twister 19937 random-number generator. To generate random integers in a given range, use a formula like in the example below. A Randomize statement with a defined seed value can be used beforehand, if a predictable sequence of numbers is desired.

Error codes:

5 無効なプロシージャー呼び出しです

例:

Sub ExampleRandomSelect

Dim iVar As Integer

    iVar = Int((15 * Rnd) -2)

    Select Case iVar

        Case 1 To 5

            Print "Number from 1 to 5"

        Case 6, 7, 8

            Print "Number from 6 to 8"

        Case Is > 8 And iVar < 11

            Print "Greater than 8"

        Case Else

            Print "Outside range 1 to 10"

    End Select

End Sub