intro.rs
/*
Rust is a systems programming language developed by Graydon Hoare at Mozilla Research in 2010.
https://en.wikipedia.org/wiki/Rust_(programming_language)
*/
fn main() {
// do something
println!("hello rust");
// hello rust
return;
}
/*
run from command-line:
$ rustc main.rs
$ ./main
run with Cargo build system and package manager:
$ cargo new <PROJECT_NAME> --bin
$ cargo run
*/