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#file: mathematics.rb.
module Mathematics
def Mathematics.add(operand_one, operand_two)
return operand_one + operand_two
end
end
file: sentence.rb
module Sentence
def Sentence.add(word_one, word_two)
return word_one + "" + word_two
end
end
file: ModuleTest.rb
include 'mathematics.rb'
include 'sentence.rb'
puts "2 + 3 = " + Mathematics.add(2, 3).to_s
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