2: Variables & functions
- Create a function without errors
- Create an integer variable without errors
- Print an integer variable to the command line without errors
Our goal for this chapter is to develop confidence about basic functions and variables in Rust.
All of our project’s source files live in the src directory, and for the
purposes of clarity, we’re only going to use the main.rs file for our
markdown compiler.
The Hello World example code provided gives us all we need to know to start customizing our project. By the end of this chapter, executing our code without arguments will output a banner–a short block of text that includes the program’s name, the author, a brief description, and usage examples.