How does error handling work in Rust?

Summary

Recoverable errors are values of type Result<T, E>, handled with match or propagated with the ? operator; unrecoverable bugs panic. Option<T> represents absence instead of null.

Longer Answer

Libraries define error enums implementing Display and std::error::Error (often with thiserror); applications often use anyhow for context. ? converts errors via From.

Key Points

• Result + ? for expected failures.
• panic! for bugs.
• Custom error enums; thiserror/anyhow.

Deep dive: Rust Fundamentals: Error Handling