Book Image

The Go Workshop

By : Delio D'Anna, Andrew Hayes, Sam Hennessy, Jeremy Leasor, Gobin Sougrakpam, Dániel Szabó
5 (1)
Book Image

The Go Workshop

5 (1)
By: Delio D'Anna, Andrew Hayes, Sam Hennessy, Jeremy Leasor, Gobin Sougrakpam, Dániel Szabó

Overview of this book

The Go Workshop will take the pain out of learning the Go programming language (also known as Golang). It is designed to teach you to be productive in building real-world software. Presented in an engaging, hands-on way, this book focuses on the features of Go that are used by professionals in their everyday work. Each concept is broken down, clearly explained, and followed up with activities to test your knowledge and build your practical skills. Your first steps will involve mastering Go syntax, working with variables and operators, and using core and complex types to hold data. Moving ahead, you will build your understanding of programming logic and implement Go algorithms to construct useful functions. As you progress, you'll discover how to handle errors, debug code to troubleshoot your applications, and implement polymorphism using interfaces. The later chapters will then teach you how to manage files, connect to a database, work with HTTP servers and REST APIs, and make use of concurrent programming. Throughout this Workshop, you'll work on a series of mini projects, including a shopping cart, a loan calculator, a working hours tracker, a web page counter, a code checker, and a user authentication system. By the end of this book, you'll have the knowledge and confidence to tackle your own ambitious projects with Go.
Table of Contents (21 chapters)
Free Chapter
1
1. Variables and Operators
2
2. Logic and Loops

Text

Go has a single type to represent some text, string.

When you are writing some text for a string, it's called a string literal. There are two kinds of string literals in Go:

  • Raw – defined by wrapping text in a pair of `
  • Interpreted – defined by surrounding the text in a pair of "

With raw, what ends up in your variable is precisely the text that you see on the screen. With interpreted, Go scans what you've written and then applies transformations based on its own set of rules.

Here's what that looks like:

package main
 
import "fmt"
 
func main() {
  comment1 := `This is the BEST
thing ever!`
  comment2 := `This is the BEST\nthing ever!`
  comment3 := "This is the BEST\nthing ever!"
 
  fmt.Print(comment1, "\n\n")
  fmt.Print(comment2, "\n\n")
  fmt.Print(comment3, "\n")
}

Running the preceding code gives...