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
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface

The for statements


As a language related to the C-family, Go also supports for loop style control structures. However, as you may have come to expect by now, Go's for statements work interestingly differently and simply. The for statement in Go supports four distinct idioms, as summarized in the following table:

For Statement

Usage

For condition

Used to semantically replace while and do...while loops:

for x < 10 {

...

}

Infinite loop

The conditional expression may be omitted to create an infinite loop:

for {
...
}

Traditional

This is the traditional form of the C-family for loop with the initializer, test, and update clauses:

for x:=0; x < 10; x++ {
...
}

For range

Used to iterate over an expression representing a collection of items stored in an array, string (array of rune), slice, map, and channel:

for i, val := range values {
...
}

Notice, as with all other control statements in Go, the for statements do not use parentheses around...