until ($odometer[$wheel] < 9 || $wheel < 0) #ok original

#negated direct form also ok
while  ( !($odometer[$wheel] < 9 || $wheel < 0) )

while ($odometer[$wheel] > 9 || $wheel < 0) # NO

while ($odometer[$wheel] > 8 || $wheel < 0) # OK but NOT for greter than limit of the odometer!
          #Use of uninitialized value in numeric eq (==) at C:\SCRIPTS\odometer.pl line 27.
          #Modification of non-creatable array value attempted, subscript -3 at C:\SCRIPTS\odometer.pl line 26.
          #getting: 9 9->

while ($odometer[$wheel] == 9 || $wheel < 0) # OK  but NOT for greter than limit of the odometer!
          #Use of uninitialized value in numeric eq (==) at C:\SCRIPTS\odometer.pl line 27.
          #Modification of non-creatable array value attempted, subscript -3 at C:\SCRIPTS\odometer.pl line 26.
          #getting: 9 9->

while ($odometer[$wheel] == 9 && $wheel >= 0)  # OK