Book Image

Rust Quick Start Guide

By : Daniel Arbuckle
Book Image

Rust Quick Start Guide

By: Daniel Arbuckle

Overview of this book

Rust is an emerging programming language applicable to areas such as embedded programming, network programming, system programming, and web development. This book will take you from the basics of Rust to a point where your code compiles and does what you intend it to do! This book starts with an introduction to Rust and how to get set for programming, including the rustup and cargo tools for managing a Rust installation and development work?ow. Then you'll learn about the fundamentals of structuring a Rust program, such as functions, mutability, data structures, implementing behavior for types, and many more. You will also learn about concepts that Rust handles differently from most other languages. After understanding the Basics of Rust programming, you will learn about the core ideas, such as variable ownership, scope, lifetime, and borrowing. After these key ideas, you will explore making decisions in Rust based on data types by learning about match and if let expressions. After that, you'll work with different data types in Rust, and learn about memory management and smart pointers.
Table of Contents (10 chapters)

Variables, types, and mutability

A variable is a named box in which a data value can be stored. The variable itself isn't the data value, just like a carton of milk is not the same thing as milk (it's waxed cardboard and such containing milk).

On the other hand, if somebody needs milk and you hand them a full milk carton, they're not going to complain, and the same goes for Rust. If a Rust expression needs an integer, and we provide a variable containing an integer, Rust will be perfectly happy with that.

Variables are most often created using the let keyword:

let x = 10;

This statement creates a variable called x containing the 10 value in it. Once that's done, we can refer to x as part of the expressions. For example, x + 5 is now a valid expression, with a resulting value of 15.

The names that for loops use are also variables, as are function parameters...