Rectangle Calculator

A struct with methods for area, perimeter, and square detection.

package main

import "fmt"

type Rectangle struct {
	Width  float64
	Height float64
}

func (r Rectangle) Area() float64 {
	return r.Width * r.Height
}

func (r Rectangle) Perimeter() float64 {
	return 2 * (r.Width + r.Height)
}

func (r Rectangle) IsSquare() bool {
	return r.Width == r.Height
}

func (r Rectangle) Display() {
	fmt.Printf("%.1f x %.1f (area: %.1f, perimeter: %.1f, square: %t)\n",
		r.Width, r.Height, r.Area(), r.Perimeter(), r.IsSquare())
}

func main() {
	shapes := []Rectangle{
		{Width: 10, Height: 5},
		{Width: 7, Height: 7},
		{Width: 3, Height: 12},
	}

	for _, s := range shapes {
		s.Display()
	}
}