intermediateBasics
Enum with Methods
Implement methods on enums.
Enum with Methods
Implement methods on enums.
Difficulty
Intermediate
Code
rust
enum Coin {
Penny,
Nickel,
Dime,
Quarter,
}
impl Coin {
fn value_in_cents(&self) -> u32 {
match self {
Coin::Penny => 1,
Coin::Nickel => 5,
Coin::Dime => 10,
Coin::Quarter => 25,
}
}
fn name(&self) -> &str {
match self {
Coin::Penny => "penny",
Coin::Nickel => "nickel",
Coin::Dime => "dime",
Coin::Quarter => "quarter",
}
}
}
fn main() {
let coins = vec![Coin::Penny, Coin::Quarter, Coin::Dime];
for coin in &coins {
println!("{}: {} cents", coin.name(), coin.value_in_cents());
}
}Explanation
This example demonstrates how to use enum with methods in Rust. Read the code carefully to understand the flow. Pay attention to where values are created, borrowed, moved, or consumed.
Key Concepts
- Rust's strong type system catches errors at compile time
- Ownership and borrowing rules ensure memory safety
- Pattern matching makes code expressive and exhaustive
Related Topics
Browse more examples in the basics category to build a complete understanding of this topic.