tour-go-exercise-24.go

package main

import (
    "fmt"
    "math"
)

func Sqrt(x float64) float64 {
    z := 1.0
    old_z := 0.0
    delta := 0.2
    
    for {
        old_z = z
        z = z - ((math.Pow(z, 2) - x) / (2 * z))

        delta_newton := math.Abs(z - math.Sqrt(x))

        if delta_newton <= delta || old_z == z {
            return z
        }
    }
}

func main() {
    for i := 1.0; i <= 10.0; i++ {
	    fmt.Println("raiz", i, Sqrt(i))
    }
}