Question
What is the difference between the && and and operators in Ruby?
Answer
and is the same as && but with lower
precedence. They
both use [short-circuit evaluation](http://en.wikipedia.org/wiki/Short-
circuit_evaluation).
WARNING: and even has lower precedence than = so you'll usually want to
avoid and. An example when and should be used can be found in the Rails
Guide under "[Avoiding Double Render
Errors](https://guides.rubyonrails.org/layouts_and_rendering.html#avoiding-
double-render-errors)".
