Puts Vs. Print: Christmas Tree Problem

So here was my lesson for the day. Puts Vs. Print:

Print: Prints out value on a single line
Puts: Puts adds a newline to the end of the output

Learned this lesson with the Pretty Christmas Tree exercise try replacing print with puts. The reason why I got it wrong initially was because the puts ' ' below was already spacing the lines and that I needs to just print the "*" on a single line, thus print:

def print_triangle(rows)
  counter = 1
  while counter <= rows do
    counter.times {print '*'}
    counter += 1
    puts ''
  end
end

puts print_triangle(5)