You can define methods on structs, allowing you to associate behavior with your data types. To define a method for a struct, you specify a receiver (which can be a value or a pointer) in the method definition:

• Value receiver

type rect struct {
	width  int32
	height int32
}

func (r rect) area() int {
   return r.width * r.height
}

• Pointer receiver

type rect struct {
	width  int32
	height int32
}

func (r *rect) area() int32 {
	return r.height * r.width
}

<aside> 💡

If you mutate the value of a struct in a pointer receiver, it is propagated to the final variable (both are referencing the same place in memory)

</aside>