rust

The Hello, World! example in Rust

main.rs

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

Compiling:

> rustc main.rs

generates main.exe on Windows and main on Linux or macOS Running:

> .\main.exe  #Windows
$ ./main      #Linux/macOS

Takeaways

• The main function is the entry point of the program
• Rust style is to indent with four spaces, not a tab
• println! calls a Rust macro, not a function
• The semicolon marks the end of an expression, but this programs compiles and execute without it. Why?

Next

The Cargo tool