The following program demonstrates a parallel loop in Go / Golang. However, this program should wait for the go routines to terminate before ending. Remove the Sleep statement and replace it by a proper goroutine synchronization. Here is the code:

package main

import "fmt"

import "time"

func main() {

x := []int{3, 1, 4, 1, 5, 9, 2, 6}

var y [8]int

// loop parallel

for i, v := range x {

go func (i int, v int) {

y[i]= calcul(v)

}(i,v) // call for the goroutine

}

// add synchronisation

time.Sleep(1*time.Second)

fmt.Println(y)

}

func calcul(v int) (int) {

return 2*v*v*v+v*v

}