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In my pursuit of applying 'good coding practice' to AutoIt, I draw your attention to the Const keyword and ask whether I should I use it in my own code when I already have an understanding of what the code is doing? Or should I use it for the purposes of debugging as Au3Check will flag a syntax error? #include <Constants.au3> Example() Func Example() Local $sMessage = 'Some message that is assigned to a variable which won''t be changed i.e. constant variable.' ; This won't change Local $iVar = 0 ; This variable in local scope will be changed. For $i = 1 To 10 $iVar += 1 Next MsgBox($MB_SYSTEMMODAL, '$iVar=' & $iVar, $sMessage) EndFunc ;==>Example OR should I use it regardless? #include <Constants.au3> Example() Func Example() Local Const $sMessage = 'Some message that is assigned to a variable which won''t be changed i.e. constant variable.' ; This won't change Local $iVar = 0 ; This variable in local scope will be changed. For $i = 1 To 10 $iVar += 1 Next MsgBox($MB_SYSTEMMODAL, '$iVar=' & $iVar, $sMessage) EndFunc ;==>Example Invoke an Au3Check error. #include <Constants.au3> Example() Func Example() Local Const $sMessage = 'Some message that is assigned to a variable which won''t be changed i.e. constant variable.' ; This won't change Local $iVar = 0 ; This variable in local scope will be changed. ; Creates an error as previously being declared as a Const. $sMessage = '' For $i = 1 To 10 $iVar += 1 Next MsgBox($MB_SYSTEMMODAL, '$iVar=' & $iVar, $sMessage) EndFunc ;==>Example