What is the purpose of the ensure block in Ruby?

What is the purpose of the ensure block in Ruby?

The ensure block in Ruby is used to guarantee that certain code runs after a block of code, regardless of whether an exception was raised or not.

Can you give me an example of how to use the ensure block?

Sure! Here's a simple example:

begin
  # code that might raise an exception
  puts 'Executing code...'
  raise 'An error occurred!'
rescue => e
  puts "Rescued: #{e.message}"
ensure
  puts 'This will always run.'
end

What happens if there is no ensure block?

If there is no ensure block, any cleanup code you want to run after the begin-rescue block won't execute if an exception occurs.

Is the ensure block optional?

Yes, the ensure block is optional, but it's useful for ensuring that certain code runs regardless of exceptions.