in reply to Re^2: How the auto-increment operator works?
in thread How the auto-increment operator works?
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
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Re^4: How the auto-increment operator works?
by zapdos (Sexton) on Aug 03, 2020 at 03:02 UTC |