# Using Structs to Structure Related Data

A *struct*, or *structure*, is a custom data type that lets you package
together and name multiple related values that make up a meaningful group. If
you’re familiar with an object-oriented language, a *struct* is like an
object’s data attributes. In this chapter, we’ll compare and contrast tuples
with structs to build on what you already know and demonstrate when structs are
a better way to group data.

We’ll demonstrate how to define and instantiate structs. We’ll discuss how to
define associated functions, especially the kind of associated functions called
*methods*, to specify behavior associated with a struct type. Structs and enums
(discussed in Chapter 6) are the building blocks for creating new types in your
program’s domain to take full advantage of Rust’s compile-time type checking.
