how can i check if a value is three numbers

[matthijsvg 0]

hi all,

i have a script that requests input. After that input has been given i want the script to check if one of the values is numeric and exactly three characters.

can anyone please help me with this?

[water 1,971]

Welcome to AutoIt and the forum!

Do you allow leading "0"s? I mean is "012"valid?

Edited July 23, 2014 by water

[water 1,971]

Something like this?

#include <MsgBoxConstants.au3>
#include <StringConstants.au3>
Global $sValue = "011"
If StringLen($sValue) = 3 And StringRegExp($sValue, "\d\d\d", $STR_REGEXPMATCH) = 1  Then MsgBox(0, "Result", "Input is numeric and consists of 3 numbers!")

[guinness 1,482]

Or StringLen() and StringIsDigit(). I also changed water's expression.

#include <MsgBoxConstants.au3>
#include <StringConstants.au3>

Local $sValue = "011"
If StringLen($sValue) = 3 And StringIsDigit($sValue) Then 
    MsgBox($MB_SYSTEMMODAL, "", "Input is numeric and consists of 3 numbers!")
EndIf

; An improved regular expression without the need for StringLen().
If StringRegExp($sValue, "^\d{3}$") Then
    MsgBox($MB_SYSTEMMODAL, "", "Input is numeric and consists of 3 numbers!")
EndIf

[matthijsvg 0]

If StringLen($sValue) = 3  Then ............. did the trick for me!

i use GUICtrlCreateInput with type $ES_NUMBER to make sure the value entered is only numeric.

thanks a lot for the answers!

[guinness 1,482]

That simple!

[jchd 1,070]

Maybe not so simple as it sounds as MSDN says:

 

 ES_NUMBER

Allows only digits to be entered into the edit control. Note that, even with this set, it is still possible to paste non-digits into the edit control.

To change this style after the control has been created, use SetWindowLong.

To translate text that was entered into the edit control to an integer value, use the GetDlgItemInt function. To set the text of the edit control to the string representation of a specified integer, use the SetDlgItemInt function.

Also it's unclear whether signs + - are allowed there.

Should the OP insist on "3 digits exactly" I'd recommend either a hook to intercept character input on the fly (more complex but very strict) or a regex a posteriori (as strict but only after the crime has been attempted, not so pretty).