Welcome to Go: Simplicity and Speed

Go (often called Golang to make it easier to search for) was created at Google in 2007 and released publicly in 2009, designed by a team that included Ken Thompson, one of the original creators of Unix and the C language. Go was built as a deliberate reaction to the complexity of languages like C++ and Java — the goal was a language simple enough to fully hold in your head, that compiles to fast native code, and that makes writing concurrent (many-things-happening-at-once) programs genuinely straightforward.

Go now powers a huge share of modern cloud infrastructure — Docker, Kubernetes, and Terraform are all written in Go, and companies like Google, Uber, and Cloudflare rely on it heavily for backend services. Its combination of C-like performance with a much simpler, more approachable syntax has made it one of the most in-demand backend languages of the last decade.

Installing Go

go version

If that is not recognized, download the installer for your operating system from go.dev — installation is a single package with no separate build tools to configure, notably simpler than setting up a C++ or Java toolchain.

Your first program

package mainnnimport "fmt"nnfunc main() {n    fmt.Println("Hello, Tutoline!")n}

Save this as hello.go and run it directly with go run hello.go — no separate compile step required during development, even though Go is a fully compiled language under the hood. To produce a standalone executable, use go build hello.go.

Understanding the pieces

Every Go file belongs to a package, declared at the top — package main specifically marks this as a runnable program with an entry point, rather than a reusable library package. import "fmt" pulls in Go’s formatting/printing package from the standard library, and func main() is where execution starts, similar to main() in C++ or Java.

What you will build across this course

By the end of this course you will understand Go’s syntax, its built-in data structures, pointers, and — Go’s signature feature — goroutines and channels, the tools that make concurrent programming dramatically simpler than in most other mainstream languages.