Recently, I learned basic of Rust. I follow the official documentation. This tutorial is based on official book documentation.

• https://doc.rust-lang.org/stable/book/

Getting Started#

Hello world#

• Install latest stable version using dustup
• Compile using rustc
• Formatter using rustfmt
• Method with ! In the end will call macro

Hello, Cargo!#

• Cargo: build system and package manager that handle dependencies.
• Create project with cargo using cargo new package_name
• In the project there will be

Cargo.toml src

• TOML: Tom’s Obvious, Minimal Language
• Cargo.toml is the project configuration.
• In src folder, it’s contains main.rs
• To build project using cargo build.
• To build and run, cargo run — it’s most used command.
• To build project without producing a binary using cargo check.
• To release project using `cargo build —release

Programming a guessing game#

• use std::ioto retrieve user input and print the result as output.
• By default variable is immutable by default — once it has value, the value won’t change.

# immutable
let apples = 5

# to mutable
let mut bananas = 5;

• Create new string with String::new().
• io::stdin().read_line( ) to read user input.
• & indicates reference — don’t need to copy the data into memory multiple times.
• Handling exception with .except
• Result is enumeration of Ok and Err — if Ok then the operation was successful, and inside Ok is the generated value. The Err variant means the operationn failed, and Err contains imformation about how or why the operation failed.
• Printing variable using println with {} or {variable_name}.
• Crate is a collection of source code — the project is called binary crate whichh is an executable.
• Library crate one of them is rand — for get random number.
• Add rand to Cargo.toml dependencies list.
• break; to quit loop
• continue; to next iteration in loop
• match is a expression that can be use for error handling, ok and err.

Here's the code and the output of the guessing game program: