Rust by Example - Collective of authors

This is the source code of the traditional Hello World program.

>// This is a comment, and is ignored by the compiler

>// You can test this code by clicking the "Run" button over there ->

>// or if you prefer to use your keyboard, you can use the "Ctrl + Enter" shortcut

>// This code is editable, feel free to hack it!

>// You can always return to the original code by clicking the "Reset" button ->

>// This is the main function

>fn main() {

>// Statements here are executed when the compiled binary is called

>// Print text to the console

>println!("Hello World!");

>}

>הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה

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println! is a macro that prints text to the console.

A binary can be generated using the Rust compiler: rustc.

>$ rustc hello.rs

rustc will produce a hello binary that can be executed.

>$ ./hello

>Hello World!

Any program requires comments, and Rust supports a few different varieties:

   • Regular comments which are ignored by the compiler:

      • // Line comments which go to the end of the line.

      • /* Block comments which go to the closing delimiter. */

   • Doc comments which are parsed into HTML library documentation:

      • /// Generate library docs for the following item.

      • //! Generate library docs for the enclosing item.

>fn main() {

>// This is an example of a line comment