What is the purpose of ensure blocks in Ruby?

What is the purpose of ensure blocks in Ruby?

Ensure blocks in Ruby are used to guarantee that certain code runs after a block of code, regardless of whether an exception was raised.

Can you give me an example of how to use an 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.

Are ensure blocks similar to finally in other languages?

Yes, ensure blocks in Ruby are similar to the finally block in languages like Java or JavaScript, as they both execute code after try-catch.