newton_sqrt.go

package main

import (
	"fmt"
)

func Sqrt(x float64) float64 {
  z := float64(1)
  for i := 0; i < 100000; i++ {
	  z = z  - (z * z - x) / 2 * z
  }
  return z
}

func main() {
	fmt.Println(Sqrt(2))
}