A ruby block is a collection of one or more lines of code enclosed by the do and end keywords (or and for inline blocks). It enables you to compile code into a single unit that can be passed as a method argument.
The explanation is that when you use block. call, you can send the block to another function if you like, however yield does not allow you to do so. When we add &block to a method's signature, we may do more than just call the block with block.
However, Ruby has featured closure-like structures known as blocks since its inception, and they're an important part of the language. They can decrease duplication and possibly make coding less error-prone when used correctly. Understanding blocks might provide you with some fantastic ideas to bring back to your native language.
The term do marks the beginning of the block, while the keyword end marks the end. Between do and end, the block body consists of one or more lines of Ruby code. You are free to use any code you like in this box. The code in the block body will be performed when the block is invoked from the method.
Block variables provide the same benefits as regular variables, but offer some additional features that make them more useful for certain tasks. Block variables can be used to store information about an object's state or values that have been calculated over time, and these values can be accessed by any other code in the same scope.