Return string issue

[pixelsearch]

Hi everybody
I have a script where a function can Return the string "retry" or alternatively simply Return to main (by using the word Return or reaching the end of the function)
But it doesn't work as expected, as a simple Return displays the MsgBox in the following script, which is not what is expected.
In fact, a few tests show that 4 different Return's fire the MsgBox, these are : Return, Return 0, Return "retry", Return True

If test() = "retry" then MsgBox(0, "", "yes")

Func test()
    Return
    ; Return 0 ; equivalent to Return (in UDF's) or end of function reached
    ; Return 1
    ; Return "retry"
    ; Return True
    ; Return False
EndFunc

I found a strange way to fix this, it's to use == instead of = (though the help file states that "== should only be used if string comparisons need to be case-sensitive")

If test() == "retry" then MsgBox(0, "", "yes")

With == everything works perfectly as only "retry" will match, great !
Of course, I could have returned only numeric values (instead of "retry") and the issue would have disappeared.

Is there something I am missing in this Return string behavior ?
Thanks

[FrancescoDiMuro]

@pixelsearch
The MsgBox() is displayed because, numerically, the string "retry" is equal to 0.
Look in the example above:

; Returns 0
ConsoleWrite("retry = " & Number("retry") & @CRLF)

; Returns True, since 0 = 0
ConsoleWrite("Test() = " & (Test() = "retry") & @CRLF)

; The MsgBox is displayed
If Test() = "retry" Then MsgBox(0, "", "Retry!")

Func Test()
    Return ; The keyword Return will always return 0 if a different value is not specified
EndFunc

This behaviour is explained here, under the section "Comparing different datatypes" 

[pixelsearch]

Thanks Francesco

[FrancescoDiMuro]

@pixelsearch
You're welcome