Terminal Triangle generator

# grab console args
arg = ARGV[0].to_i
# instantiate counters
outer_counter=0; inner_counter = 0; overall_counter = 1
# instantiate row string
row_str = ""

while outer_counter < arg 
  while inner_counter <= outer_counter 
    row_str << overall_counter.to_s + " "
    overall_counter += 1; inner_counter += 1
  end 
  puts row_str
  row_str = ""; inner_counter = 0
  outer_counter += 1
end