From: Josh Cheek <josh.cheek@...>
Date: 2010-03-12T04:20:17+09:00
Subject: Re: convert s to i, then + 1

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As long as their number isn't negative

print "Enter your favourite number: "
puts  "My favourite is: #{gets.next}"

For decimals, it won't be 1 more, but rather the last digit will be
incremented.

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