print_right_half_triangle.rb

def print_right_half_triangle(num_of_rows)
  count = 0
	last_count = 0
	for i in 1..num_of_rows
	  for j in 1..i
	  	last_count = count + j
	  	print last_count.to_s + " "
	  end
	  puts "\n"
	  count = last_count
	end
end
 
print_right_half_triangle(6)