How Does Error Handling Work in Rust? (No Exceptions!)

Error Handling
2026-04-17T12:05:42+00:00
Rust uses the Result enum and panic! macro to force explicit error handling without exceptions, ensuring robust and safe code.

Rust handles errors using the Result enum for recoverable errors and the panic! macro for unrecoverable ones, forcing you to explicitly handle failures instead of relying on exceptions. Use match or the ? operator to propagate or handle Result values, ensuring your code compiles only when all error paths are addressed.

use std::fs::File;

fn read_file() -> Result<String, std::io::Error> {
    let file = File::open("hello.txt")?;
    let mut contents = String::new();
    file.read_to_string(&mut contents)?;
    Ok(contents)
}