Book Image

Learning Go Programming

Book Image

Learning Go Programming

Overview of this book

The Go programming language has firmly established itself as a favorite for building complex and scalable system applications. Go offers a direct and practical approach to programming that let programmers write correct and predictable code using concurrency idioms and a full-featured standard library. This is a step-by-step, practical guide full of real world examples to help you get started with Go in no time at all. We start off by understanding the fundamentals of Go, followed by a detailed description of the Go data types, program structures and Maps. After this, you learn how to use Go concurrency idioms to avoid pitfalls and create programs that are exact in expected behavior. Next, you will be familiarized with the tools and libraries that are available in Go for writing and exercising tests, benchmarking, and code coverage. Finally, you will be able to utilize some of the most important features of GO such as, Network Programming and OS integration to build efficient applications. All the concepts are explained in a crisp and concise manner and by the end of this book; you would be able to create highly efficient programs that you can deploy over cloud.
Table of Contents (18 chapters)
Learning Go Programming
About the Author
About the Reviewers

The break, continue, and goto statements

Go supports a group of statements designed specifically to exit abruptly out of a running code block, such as switch and for statement, and transfer control to a different section of the code. All three statements can accept a label identifier that specifies a targeted location in the code where control is to be transferred.

The label identifier

Before diving into the core of this section, it is worthwhile to look at the label used by these statements. Declaring a label in Go requires an identifier followed by a colon, as shown in the following snippet:


Naming your label is a matter of style. However, one should follow the identifier naming guidelines covered in the previous chapter. A label must be enclosed within a function. The Go compiler will not allow unused labels to dangle in the code. Similar to variables, if a label is declared, it must be referenced in the code.

The break statement

As in other C-like languages, the Go break statement...