add_function_to_struct.go

package main

import "fmt"

type Triangle struct {
	height float32
	base   float32
}

func (triangle Triangle) area() float32 {
	return (triangle.base * triangle.height) / 2
}

func main() {

	triangle := Triangle{10, 4}
	fmt.Println(triangle)

	area := triangle.area()
	fmt.Println(area)

}