What is wrong with this ruby for loop?

Question

for current_iteration_number in 99..1 do      
   puts "#{current_iteration_number} of beer on the wall. 
   #{current_iteration_number} of beer. Take one down, 
   pass it around #{current_iteration_number} of beer."    
end

Answer 1

Instead of:

for current_iteration_number in 99..1 do

you can do:

for current_iteration_number in 99.downto(1) do