Go Programming Language For Dummies

Chapter 2

Working with Different Data Types

IN THIS CHAPTER

Declaring variables

Declaring constants

Getting rid of unused variables

Manipulating strings

Converting the data type of one value to another

This chapter explores one of the foundational building blocks of programming: how to declare variables and constants in Go. This chapter also tells you how to manipulate strings in Go and how to convert data from one type to another.

In Go, there are four types of data:

• Basic: Examples include strings, numbers, and Booleans.
• Aggregate: Examples include arrays and structs.
• Reference: Examples include pointers, slices, functions, and channels.
• Interface: An interface is a collection of method signatures.

In this chapter, I focus on the basic data types in Go. (I cover the other data types throughout the rest of this book.)

Declaring Always-Changing Variables

In programming, variables ...