In this article, the author going to talk about how to build concurrent programs combining select, goroutines, and channels in Golang.

I’d recommend reading these two articles first to get familiar with the concepts of concurrency, channels, and goroutines.

• Concurrency in Golang, Goroutines, and Channels Explained
• File Processing Using Concurrency With GoLang

Golang Select Statement

From the Go tour documentation:

“The select statement lets a goroutine wait on multiple communication operations.

A select blocks until one of its cases can run, then it executes that case. It chooses one at random if multiple are ready.”