Learn Go
Go, also called Golang, is an open-source programming language built by Google to make writing fast, reliable software simple.
What Is Go?
Go was designed in 2007 by Robert Griesemer, Rob Pike, and Ken Thompson at Google, and released publicly in 2009. The team wanted a language that combined the speed and safety of a compiled language like C++ with the readability and ease of use of a language like Python.
Go is a compiled, statically typed language. 'Compiled' means your source code is translated directly into machine code before it runs, producing a single standalone binary. 'Statically typed' means every variable's type is known and checked at compile time, before the program ever executes.
Your First Look at Go
package main
import "fmt"
func main() {
fmt.Println("Hello, Go!")
}Key Characteristics
- Compiled directly to a native, standalone executable
- Statically typed with type inference for less boilerplate
- Automatic garbage collection, so you rarely manage memory by hand
- Built-in concurrency via goroutines and channels
- Very fast compile times, even on large codebases
- A small, simple syntax that is quick to learn
Statically Typed, Compile-Time Safety
Because Go checks types before running your program, many common mistakes are caught immediately. Assigning a string to a variable declared as an int, for example, is a compile error rather than something you discover at runtime.
Types Are Fixed at Compile Time
package main
import "fmt"
func main() {
var age int = 25
var name string = "Alice"
fmt.Println(name, "is", age, "years old")
}Where Go Is Used
Go powers a huge share of modern cloud infrastructure. Docker and Kubernetes — the tools that run most of the world's containers — are written in Go. Companies like Uber, Google, Cloudflare, and Twitch use it for backend services, command-line tools, and networking software because of its speed and simple deployment model.
A Few More Facts
package main
import "fmt"
func main() {
fmt.Println("Go is compiled")
fmt.Println("Go is statically typed")
fmt.Println("Go was created at Google")
}Exercise: Go Introduction
Which company originally created the Go programming language?
Frequently Asked Questions
- Is Go a good first programming language?
- It is a good second one. Go is small, consistent and hard to write badly, which makes it pleasant once you understand programming. As a first language it can feel bare, because it deliberately omits conveniences that help beginners express ideas quickly.
- What is Go actually used for?
- Backend services, APIs, command-line tools and infrastructure software. Docker, Kubernetes and much of modern cloud tooling are written in it. Go is chosen where predictable performance, easy deployment and straightforward concurrency matter more than language features.
- Why do people say Go is good at concurrency?
- Goroutines are cheap enough to start thousands of them, and channels give a clear way to pass data between them without manual locking. The model is easier to reason about than threads in most languages, which is why network services suit it well.
