#!/usr/bin/ruby

@nan = 0.0/0.0
@inf = 1.0/0.0

def tell_me_the_truth(s)
    p = eval(s)
    if p
        puts "'#{s}' (#{p}) is TRUE."
    else
        puts "'#{s}' (#{p}) is FALSE."
    end
end

@elist = ();

tell_me_the_truth('true')
tell_me_the_truth('false')
tell_me_the_truth('0')
tell_me_the_truth('1')
tell_me_the_truth('0.0')
tell_me_the_truth('@nan')
tell_me_the_truth('@nan == @nan')
tell_me_the_truth('@inf')
tell_me_the_truth('@inf - 1')
tell_me_the_truth('@inf - @inf')
tell_me_the_truth('"0"')
tell_me_the_truth('"0.0"')
tell_me_the_truth('""')
tell_me_the_truth('@elist')
tell_me_the_truth('{}')
tell_me_the_truth('[]')
tell_me_the_truth('nil')
tell_me_the_truth('!!nil')
tell_me_the_truth('!!1')