gistfile1.txt

# print_triangle(rows) prints out a right triangle of +rows+ rows consisting 
# of * characters
#
# +rows+ is an integer
#
# For example, print_triangle(4) should print out the following: 
# *
# **
# ***
# ****

def print_triangle(rows)
  if rows == 0
    return nil
  else
    triangle = ""
    (1..rows).each do |i|
      triangle << "#{**i}"
    end
  end
  puts triangle
end