Result Basic

Handle errors with Result type.

Difficulty

Intermediate

Code

use std::num::ParseIntError;

fn parse_age(input: &str) -> Result<u32, ParseIntError> {
    input.parse::<u32>()
}

fn main() {
    match parse_age("25") {
        Ok(age) => println!("age: {}", age),
        Err(e) => println!("error: {}", e),
    }

    match parse_age("not a number") {
        Ok(age) => println!("age: {}", age),
        Err(e) => println!("error: {}", e),
    }
}

Explanation

This example demonstrates how to use result basic in Rust. Read the code carefully to understand the flow. Pay attention to where values are created, borrowed, moved, or consumed.

Key Concepts

• Rust's strong type system catches errors at compile time
• Ownership and borrowing rules ensure memory safety
• Pattern matching makes code expressive and exhaustive

Related Topics

Browse more examples in the error-handling category to build a complete understanding of this topic.