Let‘s explore Go‘s built-in support for complex numbers via the complex64 and complex128 types. For cube roots, Newton‘s method amounts to repeating:

Find the cube root of 2, just to make sure the algorithm works. There is a Pow function in the math/cmplx package.

package mainimport "fmt"func Cbrt(x complex128) complex128 {    z := complex128(1)    for i := 1;i < 10;i++{        z = z - (z*z*z -x)/(3*z*z)    }    return z}func main() {    fmt.Println(Cbrt(8))}

A Tour of Go Advanced Exercise: Complex cube roots