A go-lang implementation of Newton's square root approximation.

nsqrt.go

package main

import (
	"fmt"
)

// inspired by https://tour.golang.org/flowcontrol/8

func Sqrt(loop int, seed, square float64) float64 {

	x := seed
	for i := 0; i < loop; i++ {
		x = x - ((x*x)-square)/(2*x)
	}
	return x

}

func main() {
	fmt.Println(Sqrt(10, 1, 64))
}