Beginning Rust: Get Started with Rust 2021 Edition

© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2022

C. MilanesiBeginning Rusthttps://doi.org/10.1007/978-1-4842-7208-4_1

1. Getting Started

Carlo Milanesi¹  

(1)

Bergamo, Italy

 

In this chapter, you will learn:

• How to write and run your first program in the Rust language

• How to print text and numbers on the terminal

• How to write comments in your code

How to Start

The smallest valid Rust program is this:

fn main(){}

Of course, it does nothing. It just defines an empty function named “main.” By “function” we mean a set of instructions that does something, and that has been given a name.

fn is shorthand for “function,” while main is the name of this function. The round parentheses contain the function’s possible arguments; ...