What are some examples of error handling in Rust?

What are some examples of error handling in Rust?

In Rust, error handling is primarily done using the Result and Option types. Would you like to see specific examples?

Yes, please provide an example using the Result type.

Sure! Here's a simple example:

fn divide(a: f64, b: f64) -> Result<f64, String> {
    if b == 0.0 {
        Err("Cannot divide by zero".to_string())
    } else {
        Ok(a / b)
    }
}

This function returns a Result that can either be the division result or an error message.

What about using the Option type?

Here's an example using Option:

fn find_item(items: &[&str], target: &str) -> Option<usize> {
    for (index, &item) in items.iter().enumerate() {
        if item == target {
            return Some(index);
        }
    }
    None
}

This function returns Some(index) if the item is found, or None if it isn't.

Thanks! Can you explain when to use each type?

Certainly! Use Result when you want to handle recoverable errors, and Option when a value may be absent without an error.