Struct in a struct

package main

import "fmt"

type myPoint struct {
	x float64
	y float64
}

type myLine struct {
	a myPoint
	b myPoint
}

func main() {
	p1 := myPoint{
		x: 2.1,
		y: 3.1,
	}
	fmt.Println(p1)

	line := myLine{
		a: p1,
		b: myPoint{
			x: -0.1,
			y: 1.1,
		},
	}
	fmt.Println(line)
	fmt.Println(line.a.x)
	fmt.Println(line.b.x)
}

{2.1 3.1}
{-0.1 1.1}
{{2.1 3.1} {-0.1 1.1}}
2.1