Tour_go_exercises

ex_loop_and_func_go

package main

import (
	"fmt"
	"math"
)

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

func main() {
	z := float64(16)
	// check the math
	fmt.Println(Sqrt(z), Sqrt(z) == math.Sqrt(z))
}