sqrt.go

package main

import (
	"fmt"
	"math"
)

const round = 1000000.0

func Sqrt(x float64) float64 {
	guess := 1.0

	for i, z := 1, 1.0; i < 10; i++ {
		z -= (z*z - x) / (2 * z)
		fmt.Println(z)
		z = math.Round(z*round) / round
		if math.Abs(guess-z) < 0.001 {
			guess = z
			break
		}
		guess = z
		fmt.Println(guess)
	}
	return guess
}

func main() {
	fmt.Println("Custom result:", Sqrt(3))
	fmt.Println("Math lib result:", math.Sqrt(3))
}