Install Rust and Print Hello world#

Install Rust#

Download and run the installation program from the official Rust website.
The installation process is simple.

• Rust download : https://www.rust-lang.org/tools/install

Hello world#

Let’s create a program that prints a simple message.
I create a file named code1.rs in the path D:\works\rust\practice1, and write the following code.

fn main() {
    println!("Hello, semonan.com");
}

• Rust starts with main().
• Functions are created using the fn keyword.
• Messages can be printed using println!("~~~");.
• The ! in println!() indicates that a Rust Macro is being invoked.
• Rust uses 4 spaces instead of a tab, so there are 4 spaces before println!().
• A line of code like println!("~~~"); ends with ;. (There are cases where it does not end with ; syntactically, so use it appropriately depending on the situation.)
   

Let’s compile the source code.
The compiler for Rust is rustc.
To compile, type the command rustc code1.rs in the directory where the source code file is located.