How do I add methods in Go?

How do I add methods in Go?

In Go, you can add methods to a type by defining a function with a receiver. Would you like an example?

Yes, please provide an example.

Sure! Here's a simple example:

package main

import "fmt"

type Rectangle struct {
    width, height float64
}

func (r Rectangle) Area() float64 {
    return r.width * r.height
}

func main() {
    rect := Rectangle{width: 10, height: 5}
    fmt.Println("Area of rectangle:", rect.Area())
}

This defines a method Area for the Rectangle type.

What if I want to modify the rectangle's dimensions?

You can define a method with a pointer receiver to modify the original struct. Here's how:

func (r *Rectangle) SetDimensions(width, height float64) {
    r.width = width
    r.height = height
}

This allows you to change the dimensions of the rectangle.