def summation()
=begin
sums the first 3 integers and traces the value of the variables throughout iterations by using print statements
=end
  sum = 0
  print "sum:", "\t", sum, "\t", "\n"
  for i in 1..3 do
    print "start loop i:", "\t", i, "\t", "sum: ", sum, "\n"
    sum = sum + i
    print "end loop i:", "\t", i, "\t", "sum: ", sum, "\n"
  end
  return sum
end