Pattern matching with a match expression.md


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[[Rust]]

This looks like a regular function call but then followed by a block of code. It is called a match expression. A match expression consists of arms, that are the pattern to match and the code to execute.

For example if a function returns an enum it is a nice way to write each case, it is somewhat similar to a switch statement.

```rust
guess.cmp(&secret_number) {
    Ordering::Less => println!("Too small!"),
    Ordering::Greater => println!("Too big!"),
    Ordering::Equal => println!("You win!!"),
}
```