newton.go

package main

import (
    "fmt"
    "math"
)



func newton(x, z float64) float64{
    return z - ((math.Pow(z , 2) - x)/ (2 * z))
}

func Sqrt(x float64) float64 {
    var z = x
    for i := 0; i < 10000000; i++ {
       z = newton(x,z)
    }
    return z
}

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