Learn Rust Coding · Lesson

if let and while let

Concise matching.

Concise Matching

Sometimes you care about just one pattern. if let and while let give you concise matching without a full match.

if let runs a block only when a value matches a pattern, binding any captured data.

fn main() {
    let maybe = Some(10);
    if let Some(n) = maybe {
        println!("value is {n}");
    }
}