Hello, World

Let us jump into the simplest possible Rust program, a classic Hello World program:

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

What you see:

Functions are introduced with fn.
Blocks are delimited by curly braces like in C and C++.
The main function is the entry point of the program.
Rust has hygienic macros, println! is an example of this.
Rust strings are UTF-8 encoded and can contain any Unicode character.

References