$ perl -Mwarnings -E 'say scalar("a" .. "g")'
Argument "a" isn't numeric in range (or flip) at -e line 1.
Use of uninitialized value $. in range (or flip) at -e line 1.
Argument "g" isn't numeric in range (or flop) at -e line 1.
Use of uninitialized value $. in range (or flop) at -e line 1.
1E0