What is an interface in Go?
- A data structure to hold multiple values.
- A type that defines a set of methods.
- A way to group variables of similar types.
- A reserved keyword in Go.
In Go, an interface is a type that defines a set of method signatures. It acts as a contract that specifies which methods a concrete type must implement. Interfaces are essential for achieving polymorphism and abstraction in Go, allowing different types to be treated uniformly if they satisfy the interface requirements. They enable you to write more flexible and maintainable code by decoupling the implementation details from the usage of types.
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