recursion.rb

learn.rb

def recursion(arg, arg2=[]) #5
  arg2 << arg
  p arg2
  if arg <= 0 #false
    puts "arg: #{arg}, finished" #no
    return
  end
  puts "before: #{arg}" # before: 5
  recursion(arg-1, arg2) # recursion(4) ...brb
  puts "after: #{arg}" #5
end

recursion(5)