If Let: Concise State Unwrapping

When you are only interested in a single variant (such as unpacking an Option<T> or a specific Result<T, E>), standard match can feel boilerplate-heavy because you are forced to write a trailing wildcard branch _ => {}.

if let solves this by combining a pattern match and a conditional test into a concise block.

Standard Refactoring Example

Without if let:

let active_app: Option<String> = Some("Chrome".to_string());

match active_app {
    Some(name) => log_app(name),
    _ => {} // Boilerplate wildcard
}

With if let:

if let Some(name) = active_app {
    log_app(name);
}

Mixing with Else

You can also append an else branch, which behaves identically to the fallback wildcard arm:

if let Some(name) = active_app {
    focus_window(name);
} else {
    focus_desktop();
}