in reply to Re: How the auto-increment operator works?
in thread How the auto-increment operator works?

I don't get it. Can you explain more thoroughly please?
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Re^3: How the auto-increment operator works?
by jcb (Parson) on Aug 02, 2020 at 00:31 UTC

    When you are counting in base-10 and you reach 99, you add a leading "1" instead of wrapping back to only "00". The magic autoincrement does the same with letters: when you reach the end of the alphabet, it adds a leading "a" while wrapping back instead of repeating a previous value.

    This is also why "z" becomes "aa":

    $ perl -e '$X = "z"; print $X, "\n"; $X++; print $X, "\n";'
    z
    aa
    
      Thank you ;-)