exercise-loops-and-functiions.go

package main

import (
    "fmt"
)

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

    for i := 0; i < 1000; i++ {
        z = z - (z * z - x) / (2 * z)
    }
    return z
}

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