Pattern Matching

Match with guards

Arms can include extra conditions.

let n = 7;
match n {
    1..=5 => println!("small"),
    x if x % 2 == 0 => println!("even"),
    _ => println!("other"),
}

if let for one case

Use when you only care about one pattern.

let value = Some(3);
if let Some(n) = value {
    println!("{n}");
}

Destructure structs

Pull fields out in a match or let pattern.

struct Point { x: i32, y: i32 }
let p = Point { x: 1, y: 2 };
let Point { x, y } = p;
println!("{x},{y}");

Matching tips

• match must be exhaustive
• Use _ for values you intentionally ignore
• Prefer readable arms over clever nested patterns
• Combine with enums for clear control flow