"James F.Hranicky" <jfh / cise.ufl.edu> writes:

> Hmmm...I haven't run across "?\n" before -- what does that do?

It returns the character code for the following character:

irb(main):005:0> ?A
65
irb(main):006:0> ?B
66
irb(main):007:0> ?C
67

-- 
Josh Huber