Variable used without being declared even though it is defined

[adjist]

Hello all! 

 

Getting this error :

(22) : ==> Variable used without being declared.:
if $vNumber = 0 Then
if ^ ERROR

 

But I'm sure I have defined the variable, as in the top of my script has 

Global $vNumber = 0

 

How would I go about fixing this?

 

[Earthshine]

First post your entire script

[adjist]

Oh, I think I have figured it out. I no longer get an error any more when I put 

Global $vNumber

In the beginning of each of my functions

Edited January 26, 2020 by adjist

[Earthshine]

That sounds very wrong if it’s global it’s scope is global to the entire program and you shouldn’t have to declare it more than once

[adjist]

22 minutes ago, Earthshine said:

That sounds very wrong if it’s global it’s scope is global to the entire program and you shouldn’t have to declare it more than once

erm.. forget I said that

 

here is what I said on another post, this is pretty much what I am wanting to do

19 minutes ago, adjist said:

I see,

So you're saying , set something such as ?

Global $example = 0

At the top of my script, and inside the func I put ?

Func example()
$example = 1

;code

$example = 0
EndFunc

But when I do this, I get this error,

Variable used without being declared.

 

 

[Subz]

You should post your entire code because the example above wouldn't give you an error.

Global $example = 0
example()
MsgBox(4096, "", "$example = " & $example)

Func example()
    $example = 1
    MsgBox(4096, "", "$example = " & $example)
    $example = 0
EndFunc

 

[adjist]

wow.

 

i had accidentally called my functions before declaring the global value

everything works now

I'm an idiot!

[Earthshine]

That’s why I ask you to post your whole script so we could see what’s going on

[adjist]

Also, is there any way I could read the variable from a loop?

 

Such as: 

Global $test = 0

yea()
example()

Func yea()
    While(1)
        $test = 1
        ;code
        $test = 0
    WEnd
EndFunc

func example()
    if $test = 1 Then
        ConsoleWrite("hello")
    EndIf
EndFunc

 

[jchd]

Didn't you try to run such a snippet?

[adjist]

1 minute ago, jchd said:

Didn't you try to run such a snippet?

Yes.

I guess functions cannot update variables globally?

[jchd]

Yes you can!

RTFM and see that's precisely the purpose of Global.

[adjist]

1 minute ago, jchd said:

Yes you can!

RTFM and see that's precisely the purpose of Global.

Sorry, I meant that I guess that functions cannot update variables while they are inside a loop

[jchd]

Wrong guess again.
What makes you believe that?

[adjist]

Just now, jchd said:

Wrong guess again.
What makes you believe that?

Well, if I try to change a variable in a loop such as

Func yea()
    While(1)
        $test = 1
        ;code
        $test = 0
    WEnd
EndFunc

and have an if statement (inside another function) such as 

func example()
    if $test = 1 Then
        ConsoleWrite("hello")
    EndIf
EndFunc

It won't print the message

If there is a way to do it, could you be able to tell me how?

[jchd]

1 minute ago, adjist said:

It won't print the message

No need to try to run the code, it's obvious the message can't be printed.

Beside the fact that the present code will never exit the function yea() since it contains an infinite loop without exit route, you reset $test to 0 before invoking example(), so no wonder the msg never prints.

[jchd]

Runable code:

Global $test = 0

yea()
example()

Func yea()
    Local $t = TimerInit()
    Do
        $test += 1
    Until TimerDiff($t) > 1000
EndFunc

func example()
    if $test > 0 Then
        ConsoleWrite("$test is now " & $test & @LF)
    EndIf
EndFunc

 

[adjist]

9 minutes ago, jchd said:

Runable code:

Global $test = 0

yea()
example()

Func yea()
    Local $t = TimerInit()
    Do
        $test += 1
    Until TimerDiff($t) > 1000
EndFunc

func example()
    if $test > 0 Then
        ConsoleWrite("$test is now " & $test & @LF)
    EndIf
EndFunc

 

I appreciate it!

[Somerset]

2 hours ago, jchd said:

Yes you can!

RTFM and see that's precisely the purpose of Global.

Autoit has a manual? What edition is it up to?