Difference between revisions of "Rust-Programming-Language/C2/Hello-World-using-Cargo/English"

Title Slide

Learning Objectives

• Create a cargo project
• Write a Hello world rust program
• Compile and Run the cargo project

System Requirements

• Ubuntu Linux OS version 22.04
• Rust version 1.80.0
• Visual studio code version 1.19.0

Prerequisite

• You must have basic knowledge of any programming language
• You should also have Rust installed on your system.

About Cargo

• Cargo is a Rust build system and package manager
• Cargo handles the compilation process and automates the building of your project.
• Cargo allows you at add and manage external libraries
• In the Cargo.toml file, you can list your dependencies.
• Complex Rust programs need these dependencies to develop Rust projects.

We can see a terminal window at the bottom.

>mkdir Desktop/MyRustProject

>cd Desktop/MyRustProject

In the terminal, type as shown to create a directory MyRustProject.

We will save all the Rust Projects in this directory required for this series.

>cargo new helloworld

A binary cargo application has been created.

Select hello folder under MyRustPRoject

Go to Desktop and then select MyRustProject.

Locate the helloworld folder.

Then click on the open button at the top right corner.

Click the src folder, and you can see that a file called main.rs is created.

Click on it to open the file.

All the code has to be run using this particular file main.rs.

By default, we can see a hello world program on the right panel.

fn main() {

println!("Hello, World!");

}

Inside the curly braces `{ ... }` Println command prints the text hello world.

The semicolon `;` at the end indicates the end of the command.

Save the file by pressing Ctrl + S.

Let us compile and run the program.

Make sure that we are inside the cargo project that is helloworld

When successfully compiled, we see a finished message.

Then type cargo run

Println!(“Welcome to Rust Spoken Tutorial”);

Press Ctrl+s

In the code window, type a print statement “welcome to Rust spoken tutorial” as shown.

Press Ctrl+ S to save the file.

We can see both the text messages as output.

Did you notice that?

When we do a cargo run, the package manager will build again and run the project.

So going forward, we can directly use cargo run to build and run the project in one go.

We see two sections namely package and dependencies.

This is where we can write all the project related information like name, version, authors, edition.

We can even mention dependencies which the project depends upon.

Summary

Let us summarize.

Assignment

• Create a cargo project named assignment
• Print - “ Welcome to Rust Assignment”
• Compile and execute the project
• Observe the output in the Terminal

Thank you