To-Do List

Concepts Used: Arrays, Loops, Methods, File Handling

tasks = []

loop do
  puts "\n--- To-Do List ---"
  puts "1. Add Task"
  puts "2. View Tasks"
  puts "3. Remove Task"
  puts "4. Exit"
  print "Choose option: "

  choice = gets.chomp.to_i

  case choice
  when 1
print "Enter task: "
task = gets.chomp
tasks << task
puts "Task added!"
  when 2
puts "\nYour Tasks:"
tasks.each_with_index { |t, i| puts "#{i+1}. #{t}" }
  when 3
print "Enter task number to remove: "
num = gets.chomp.to_i
if num > 0 && num <= tasks.length
  tasks.delete_at(num-1)
  puts "Task removed!"
else
  puts "Invalid task number."
end
  when 4
puts "Goodbye!"
break
  else
puts "Invalid choice!"
  end
end

Explanation:

• Stores tasks in an array.
• Uses loop do ... end for continuous menu.
• each_with_index → shows tasks with numbers.
• delete_at → removes task by index.