👉 A gherkin is a type of code structure that is used to describe the syntax and semantics of programming languages. It consists of a series of curly braces `{}` inside a square bracket `( )`, which defines the basic structure of a program, including variables, functions, methods, classes, etc. Gherkins are commonly used in object-oriented programming (OOP) where they represent classes that have attributes and behaviors. They can be nested within other gherkins to create more complex structures.