golang goroutine code example

Example 1: golang goroutines

package main

import (
	"fmt"
	"sync"
	"time"
)

func waitGroup() {
	var wg sync.WaitGroup

	wg.Add(1)
	go func() {
		defer wg.Done()
		fmt.Println("hello world 1")
	}()

	wg.Add(1)
	go func() {
		defer wg.Done()
		fmt.Println("hello world 2")
	}()

	wg.Add(1)
	go func() {
		defer wg.Done()
		fmt.Println("hello world 3")
	}()

	wg.Wait()
}

func sleepTime() {
	go func() {
		fmt.Println("hello world 4")
	}()

	go func() {
		fmt.Println("hello world 5")
	}()

	go func() {
		fmt.Println("hello world 6")
	}()

	time.Sleep(time.Second * 1)
}

func main() {
	// waitGroup()
	sleepTime()
}

Example 2: goroutine

// just a function (which can be later started as a goroutine)
func doStuff(s string) {
}

func main() {
    // using a named function in a goroutine
    go doStuff("foobar")

    // using an anonymous inner function in a goroutine
    go func (x int) {
        // function body goes here
    }(42)
}

Example 3: run thread golang

func f(s string){
	fmt.Println(s)
}

func main(){
	go f("goroutine")
}

Example 4: goroutine

package main