Tip calculator

tip.rb

puts "How much did the meal cost?"

inputok = false
until inputok == true do
mealprice = gets.chomp.to_f
	
if mealprice > 0
	mealprice = (mealprice*1.20).round(2).to_s.split(".")
	inputok = true
else
	puts "I only understand numbers.  Please input a number."
	inputok = false
end
end

if mealprice[1].to_i < 10
	mealprice[1] = (mealprice [1]).to_s + "0"
end

mealprice = mealprice.join(".")

puts "You should pay $#{mealprice} including a 20% tip."