Implementing structs

You can also implement structs , which means you can attach functions to instances of structs

(Very similar to classes in TS)

Passing in &self as the first argument to a function

struct Rect {
   width: u32,
   height: u32,
}

impl Rect {
    fn area(&self) -> u32 {
         self.width * self.height
    }
}

fn main() {
    let rect = Rect {
        width: 30,
        height: 50,
    };
    print!("The area of the rectangle is {}", rect.area());
}

Not passing in &self as the first argument

struct Rect {
    width: u32,
    height: u32,
 }

 impl Rect {
     fn print_str() {
        println!("Inside the rect struct");
     }
 }

 fn main() {
    Rect::print_str();
 }