Basics
Rust Comments
Rust Comment Syntax
Rust comments use // and /* */ with doc comments for APIs.
Introduction to Rust Comments
Comments are an essential part of programming, allowing developers to explain their code, document APIs, and enhance readability. Rust provides two primary types of comments, single-line and multi-line, along with doc comments specifically for API documentation.
Single-line Comments
Single-line comments in Rust are initiated with //. Everything following these slashes on the same line is ignored by the compiler. They're ideal for brief explanations or notes.
Multi-line Comments
Multi-line comments start with /* and end with */. These comments can span multiple lines and are useful for commenting out blocks of code or writing longer explanations.
Doc Comments
Doc comments in Rust start with /// and are used to generate documentation for APIs. When you run cargo doc, these comments are included in the output. Use them effectively to describe the purpose and usage of your functions and structs.
Best Practices for Using Comments
- Avoid redundant comments that simply restate the code.
- Keep comments concise and informative.
- Regularly update comments to reflect code changes.
- Use doc comments for public APIs to provide clear usage instructions.
