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Installation

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We will download rust through -> rustup (a command line tool for managing Rust versions and associated tools)

To install the Rust on the Linux:

$ curl --proto '=https' --tlsv1.2 https://sh.rustup.rs -sSf | sh

To check the version of the rust:

$ rustc --version

We will also need linker if we face anly linker issue for which we have to download C compiler.

To download the C compiler (gcc) in Linux:

$ sudo apt install build-essential

To update the Rust version:

$ rust update

To uninstall the Rust:

$ rust self uninstall

In VS Code download the rust-analyzer extension to work with the rust.

Hello World in Rust

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fn main(){ 
    println!("Hello World"); 
}

Save this file with name main.rs

To compile and run the file :

rustc main.rs

It will make a binary executed file "main"

To run the "main" file :

./main

Output -> Hello World

In rust only main fn is run. Other code outside the main will not be executed.

To format the code :

$ rustfmt main.rs

! -> means that we are calling a macro instead of a normal function

Cargo

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Like in node we do "npm init" if we want to create a project, in Rust we use Cargo

To create a project "hello"

cargo new hello

It will make the folder with name "hello" which contains config file and the src folder which conatains the main files which are to be executed .

Folder Structure :

• Cargo.toml -> It is the config file for the project. It conatins the version, name and the dependencied we are working with.

• src

  |_ main.rs -> This is the entry point of the project.

To build the cargo project :

$ cargo build

It will create the target folder and Cargo.lock(config file).

To run the project main file :

./target/debug/project

We can also run the project by :

$ cargo run

To check the errors in the project :

$ cargo check

It will compile but do not make the executable file.

Building for release

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When our project is ready for release, we can release it using:

$ cargo build --release

It will make the program optimize and faster but it takes more compilation time, so it is better to it use when our project is ready to go to production.