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If Let

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% if let

<small>There is a new edition of the book and this is an old link.</small>

The if let syntax lets you combine if and let into a less verbose way to handle values that match one pattern and ignore the rest.

rust
let some_u8_value = Some(3u8);
if let Some(3) = some_u8_value {
    println!("three");
}

Here are the relevant sections in the new and old books: