A little Rust.
Less rusty.

Start with a complete program. Rust code uses keywords and punctuation to say what should run.

• fn defines a function: a named piece of code.
• main is where this small executable starts. Its empty () means it takes no arguments.
• { and } surround the function body.
• println! is a macro that prints text followed by a new line. The ! is part of the macro call syntax.
• Double quotes surround text. The semicolon ends the printing statement.

Save this as main.rs. In a terminal on macOS/Linux, run:

rustc main.rs
./main

In Windows PowerShell, run:

rustc main.rs
.\main.exe

The program prints one line. Choose Explore beside the Rust example to inspect any piece.