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I'm new at VB and I'm having a hard time doing something that should be very simple.
I'm trying to make an array of n+1 length and I keep getting "Constant expression required" when running the following code
Function binomial(n As Integer, p As Double) Dim probabilities(0 To n) As Double End Function I understand that the arguments used to build the array must be constants, but do I create one from the argument of the function?
Thank you in advance
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This error has the following causes and solutions: You tried to initialize a constant with a variable, an instance of a user-defined type, an object, or the return value of a function call.
A constant expression is an expression that contains only constants. A constant expression can be evaluated during compilation rather than at run time, and can be used in any place that a constant can occur.
The fix is simple; change the Foo.BA* variable declarations to have initializers that are compile-time constant expressions. In other examples (where the initializers are already compile-time constant expressions), declaring the variable as final may be what is needed.
Declare a dynamic array By declaring a dynamic array, you can size the array while the code is running. Use a Static, Dim, Private, or Public statement to declare an array, leaving the parentheses empty, as shown in the following example. Use the ReDim statement to declare an array implicitly within a procedure.
You can't DIM against a variable size. ReDim it instead
For example
Function binomial(n As Integer, p As Double) Dim probabilities() As Double ReDim probabilities(0 To n) MsgBox LBound(probabilities) MsgBox UBound(probabilities) End Function Sub test() Call binomial(3, 2) End Sub Run the sub "test"
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