Tour of Go Complex Cube Roots

cubes.go

package main

import "fmt"
import "math/cmplx"

func Cbrt(x complex128, z complex128) complex128 {
	for i := 0; i < 10; i++ {
		z = z - (cmplx.Pow(z, 3)-x)/(3*cmplx.Pow(z, 2))
	}
	return z
}

func main() {
	var r complex128 = Cbrt(2, 1)
	fmt.Println(r)
	fmt.Println(cmplx.Pow(r, 3))
}