File Based Notes App

File Handling, Loops

FILENAME = "notes.txt"

loop do
  puts "\n--- Notes App ---"
  puts "1. Write Note"
  puts "2. View Notes"
  puts "3. Exit"
  print "Choose option: "
  choice = gets.chomp.to_i

  case choice
  when 1
print "Enter your note: "
note = gets.chomp
File.open(FILENAME, "a") { |f| f.puts(note) }
puts "Note saved!"
  when 2
if File.exist?(FILENAME)
  puts "\nYour Notes:"
  puts File.read(FILENAME)
else
  puts "No notes found."
end
  when 3
puts "Goodbye!"
break
  else
puts "Invalid option."
  end
end

Explanation:

• "a" → appends to file without deleting old notes.
• File.read → reads all notes.
• Stores notes in notes.txt.