How does error handling work in Rust?

How does error handling work in Rust?

In Rust, error handling is primarily done using the Result and Option types. Result is used for functions that can return an error, while Option is used for values that can be absent.

Can you explain the difference between Result and Option?

Sure! Result<T, E> is used when a function can return a value of type T or an error of type E. Option<T>, on the other hand, is used when a value can either be Some(T) or None, indicating the absence of a value.

How do I handle errors using the ? operator?

The ? operator is a convenient way to propagate errors. If a function returns a Result, you can use ? to return the error immediately if it occurs, simplifying error handling.

Can you give me an example of using Result and the ? operator?

Certainly! Here's a simple example:

fn read_file(path: &str) -> Result<String, std::io::Error> {
    let content = std::fs::read_to_string(path)?;
    Ok(content)
}