Use of Functions

[bplus]

Most times when I use x in f(x) I don't want to change x, that could mess things up badly!

Here's how variable changing may be misused with a sub

Code: (Select All)

For x = 1 To 10
    f x
    Print x
Next

Sub f (x)
    x = x ^ 2
End Sub

With function it's clear x wont get messed up:

Code: (Select All)

For x = 1 To 10
    Print f(x)
Next

Function f (x)
    f = x ^ 2
End Function