exercise1.go

package main

import (
    "fmt"
)

func Sqrt(x float64) float64 {
    z := 1.0
    for i := 0; i < 10; i++ {
    	z = z - (z*z-x)/(2*z)   
    }
    return z
}

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