A Tour of Go. Exercise: Loops and Functions. As a simple way to play with functions and loops, implement the square root function using Newton's method. In this case, Newton's method is to approximate Sqrt(x) by picking a starting point z and then repeating: To begin with, just repeat that calculation 10 times and see how close you get to the an…

exercise-24.go

package main

import (
    "fmt"
    "math"
)

func Sqrt(x float64) float64 {
    z := 1.0
    for i := 1; i <= 10; i++ {
        z = z - (z * z - x) / (2 * z)
    }
    return z
        
}

func main() {
    nums := []float64{1, 2, 3, 4}
    for _, v := range nums {
    	fmt.Println(Sqrt(v), math.Sqrt(v))
    }
}