Loops and Functions

package main

import (
	"fmt";
	"math"
)

func Sqrt(x float64) float64 {
	count := 0
	var old_z, z float64 = 0, 1
	for ; math.Abs(z-old_z) > .001; count++ {
		old_z, z = z, z - (z*z - x) / 2*z
	}
	fmt.Printf("Ran %v iterations\n", count)
	return z
}

func main() {
	fmt.Println(math.Sqrt(2))
	fmt.Println("Result: ", Sqrt(2))
}