sort without using the built in SORT method

arrays2.rb

# a little program to accept a list of words, sort them without using the sort method, and output them in alphabetical order
i, j = 0, 0 # initialization of index variables
words, words2 = [], []
a_word = 'a' # dummy initialization to get into the until loop below
puts "Type a word and press <Enter> (Enter a blank line to quit):"
# Loop to accept an unspecified number of words-- creates original array
until a_word.empty?
  a_word = gets.chomp
  unless a_word.empty?
    words.push a_word
    i += 1
  end # end if
end # end until

while words.length > 0
  i = words.length - 1
  # I will sort by looking for the lowest value word in the original array and pushing it on to the new array
    a_word = words[0] # initialize with the first element in the array
    a_index = 0
    for j in 1..i
      b_word = words[j] # assign  second element to a var
      if a_word.upcase > b_word.upcase  # compare the two words
        a_word = words[j]
        a_index = j  # variable so I can reference the words pushed onto the new array
      end  # end if
    end  # end for
    words2.push a_word  # push smallest word onto new array
    words.delete_at(a_index) # delete the lowest element in the original array
    i -= words.length
end # end while
puts words2