When working in Ruby debuggers like [pry], [byebug], or [irb] you might want to grab the value for your last command but you forgot to store it to a variable.

Have no fear! The value returned by the last command always gets stored in an underscore variable `_`:

``` shell
> Executing task: bin/rails console <

Running via Spring preloader in process 3997
Loading development environment (Rails 6.1.4)
bestreads-development> Book.count
   (2.1ms)  SELECT COUNT(*) FROM "books"
  => 10201
bestreads-development> _
  => 10201
```

[pry]: http://pry.github.io
[byebug]: https://github.com/deivid-rodriguez/byebug
[irb]: https://ruby-doc.org/stdlib-2.4.0/libdoc/irb/rdoc/IRB.html

Sometimes you want to access the value returned by the last command you wrote into a Ruby REPL. There’s a trick for that.

Grabbing the last result in common Rails debuggers

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