Option Explicit Statement

Specifies that every variable in the program code must be explicitly declared with the Dim statement.

The Option Explicit statement is evaluated at run time.

Option Explicit

This statement must be added before the executable program code in a module.


Option Explicit
Sub ExampleExplicit
Dim sVar As String
    sVar = "Las Vegas"
    For i% = 1 to 10  REM 這將導致執行階段錯誤
        Rem
    Next i%
End Sub