Goroutine creation - Mini Project: Build & Apply

Goroutine creation

📖 Scenario: You are building a simple Go program that runs tasks concurrently to save time, like having multiple helpers working at once.

🎯 Goal: Create a Go program that launches a goroutine to print a message concurrently with the main function.

📋 What You'll Learn

Create a function called sayHello that prints "Hello from goroutine!"

Launch sayHello as a goroutine from the main function

Add a short pause in main to allow the goroutine to finish before the program exits

💡 Why This Matters

🌍 Real World

Goroutines let programs do many things at once, like handling multiple users or tasks simultaneously.

💼 Career

Understanding goroutines is essential for Go developers working on fast, efficient, and concurrent applications.

1

Create the sayHello function

Write a function called sayHello that prints the text "Hello from goroutine!" using fmt.Println.

Go

package main

import "fmt"

func sayHello() {
    // Your code here
}

func main() {

}

Hint

Use func sayHello() to define the function and fmt.Println to print the message.

2

Launch sayHello as a goroutine

Inside the main function, start the sayHello function as a goroutine using the go keyword.

Go

package main

import "fmt"

func sayHello() {
    fmt.Println("Hello from goroutine!")
}

func main() {
    // Your code here
}

Hint

Use go sayHello() inside main to start the goroutine.

3

Add a pause to let the goroutine finish

Import the time package and add time.Sleep(time.Second) inside main after launching the goroutine to pause the program for 1 second.

Go

package main

import (
    "fmt"
    // Your code here
)

func sayHello() {
    fmt.Println("Hello from goroutine!")
}

func main() {
    go sayHello()
    // Your code here
}

Hint

Use import "time" and time.Sleep(time.Second) to pause the main function.

4

Run the program and see the output

Run the program and print the output. The program should print Hello from goroutine!.

Go

package main

import (
    "fmt"
    "time"
)

func sayHello() {
    fmt.Println("Hello from goroutine!")
}

func main() {
    go sayHello()
    time.Sleep(time.Second)
    // Your code here
}

Hint

Run the program and check the console output.