What is the purpose of an interface in programming, and how does it differ from a class?
What is the purpose of an interface in programming, and how does it differ from a class?
28121-Jun-2023
Updated on 24-Jun-2023
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What is the purpose of an interface in programming, and how does it differ from a class?
Aryan Kumar
24-Jun-2023An interface in programming is a contract that specifies the behavior of a class. It defines the methods that a class must implement, but it does not define how the methods are implemented. Interfaces are useful for decoupling different parts of a program and for allowing different implementations of the same interface.
Here are some of the purposes of an interface in programming:
Here are some of the differences between an interface and a class:
Here is an example of an interface in Rust:
Rust
This interface defines a single method called
foo()
. Any class that implements theFoo
interface must implement thefoo()
method.Here is an example of a class that implements the
Foo
interface:Rust
This class implements the
Foo
interface by defining thefoo()
method.As you can see, the interface defines the behavior of the class, but it does not define how the behavior is implemented. This allows different classes to implement the same interface in different ways.