puts 'Welcome to your todo list:'
  toDo = File.new('ToDo.txt','w+' )
  puts 'Todo List:'
  puts File.read('ToDO.txt')
  item_array = ['feed cat']

  program_continue = true
  while program_continue == true
  puts 'Type:'
  puts 'view: to view items on to-do list'
  puts 'add: to add no item'
  puts 'edit: to edit existing item'
  puts 'delete: to delete existing item'
  puts 'end: to end program'
  choice = gets.chomp.downcase
  if choice == 'add'
   puts 'How many items would you like to add: '
    num = gets.to_i
    counter = 1
    while counter <= num
      puts "Enter item #{counter}: "
      item = gets.chomp.downcase
      item_array << item
      counter += 1
    end
  elsif choice == 'edit'
    puts 'type item to be edited: '
    item_to_be_edited = gets.chomp.downcase
    if item_array.include?(item_to_be_edited)
      puts 'enter updated item'
      update_item = gets.chomp.downcase
      item_array.map! { |element|
        if (element == item_to_be_edited)
          update_item
        else
          element
        end
      }
    else
      puts 'Error item does not exist'

    end
  elsif choice == 'delete'
    puts 'Enter item to be deleted:'
    item_to_be_deleted = gets.chomp.downcase
    if item_array.include?(item_to_be_deleted)
     item_array.delete(item_to_be_deleted)
    else
      puts 'Error item does not exist'

    end
  elsif choice == 'view'
    puts 'Todo List:'
    puts File.read('ToDO.txt')
  elsif choice == 'end'
    program_continue = false
      else
      puts 'Error wrong input'
      puts ''
      end
 File.open('ToDo.txt', 'w+') do |f|
   item_array.each do |element| f.puts(element) end
 end
     end
  toDo.close
  puts 'Todo List:'
  puts File.read('ToDO.txt')