Question

I am wanting to clarify if it is not possible to declare types in Ruby or is it just not necessary? If someone wanted to declare datatypes would it be possible.

Update: My point in asking is to understand if providing a static type for variables that won’t change type will provide a performance increase, in theory.

Answer 1

Some languages as C or Java use “strong” or “static” variable typing. Ruby is a “dynamically typed” language aka “duck typing”, which means that variable dynamically changes its own type when type of assigned data has changed.

So, you can’t declare variable to some strict type, it will always be dynamic.