---
title: "Explain the role of the 'go' keyword in starting concurrent goroutines."  
description: "Explain the role of the 'go' keyword in starting concurrent goroutines."  
author: "Sandra Emily"  
published: 2023-10-17  
updated: 2023-10-17  
canonical: https://www.mindstick.com/forum/160187/explain-the-role-of-the-go-keyword-in-starting-concurrent-goroutines  
category: "go"  
tags: ["go", "golang"]  
reading_time: 2 minutes  

---

# Explain the role of the 'go' keyword in starting concurrent goroutines.

[Explain the role](https://www.mindstick.com/forum/160496/explain-the-role-of-the-web-xml-file-in-a-servlet-application) of the 'go' [keyword](https://www.mindstick.com/forum/33572/sql-inner-join-keyword) in [starting](https://www.mindstick.com/blog/12024/things-you-need-to-know-when-starting-your-own-business) concurrent goroutines.

## Replies

### Reply by Aryan Kumar

The **go** keyword in Go (also known as Golang) plays a vital [role](https://yourviews.mindstick.com/audio/1254/the-role-of-visualization-in-achieving-your-goals) in starting concurrent goroutines. It's a powerful feature that allows you to create lightweight, independently executing functions or code blocks, known as goroutines, in your Go programs. Here's a humanized explanation of the role of the **go** keyword:

1. **Concurrency with Goroutines**: Go is designed for efficient concurrent programming. Instead of using traditional threads, Go utilizes goroutines. A goroutine is like a small, concurrent unit of execution.
2. **Starting a Goroutine**: To start a goroutine, you use the **go** keyword followed by a function or code block. When you add **go** before a function call or code block, it instructs the Go runtime to execute that code concurrently in a new goroutine.
3. **Lightweight and Efficient**: Unlike traditional threads, goroutines are lightweight, which means you can create thousands of them without causing a lot of overhead. They're managed efficiently by the Go runtime.
4. **Concurrency without Blocking**: One of the key benefits of goroutines is that they allow your program to perform multiple tasks concurrently without blocking the main program's execution. This is crucial for building efficient and responsive applications.

Here's a simple example in Go that demonstrates the use of the **go** keyword to start concurrent goroutines:

```plaintext
package main

import (
	"fmt"
	"time"
)

func sayHello() {
	for i := 0; i < 5; i++ {
		fmt.Println("Hello")
		time.Sleep(time.Millisecond * 500)
	}
}

func sayWorld() {
	for i := 0; i < 5; i++ {
		fmt.Println("World")
		time.Sleep(time.Millisecond * 500)
	}
}

func main() {
	// Start two goroutines concurrently
	go sayHello()
	go sayWorld()

	// Sleep to allow goroutines to complete
	time.Sleep(time.Second)
}
```

In this example, we use the **go** keyword to start the **sayHello** and **sayWorld** functions as concurrent goroutines. They run independently and concurrently, printing "Hello" and "World" alternately. The **main** function then sleeps for a second to allow the goroutines to complete their execution.

The **go** keyword is a fundamental building block for concurrent programming in Go, making it easier to build scalable and responsive applications.


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Original Source: https://www.mindstick.com/forum/160187/explain-the-role-of-the-go-keyword-in-starting-concurrent-goroutines

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