The Only Options Trading Book

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enum Coin
Penny,
Nickel,
Dime,
Quarter,

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fn value_in_cents(coin: Coin) -> u8
match coin
Coin::Penny => 1,
Coin::Nickel => 5,
Coin::Dime => 10,
Coin::Quarter => 25,

“The provided Rust code defines an enumCoinwith four variants representing different coins: Penny, Nickel, Dime, and Quarter, along with a functionvalue_in_centsthat takes aCoin` as input and returns its value in cents. In a nutshell, here’s what each part of the code does:

1. Enum Coin:

   • This enum defines four variants representing different US coins:
     • Coin::Penny for a Penny
     • Coin::Nickel for a Nickel
     • Coin::Dime for a Dime
     • Coin::Quarter for a Quarter

2. Function value_in_cents:

   • This function takes an input parameter coin of type Coin.
   • Using a “match” statement, it checks the value of the input coin and returns the corresponding value in cents:
     • For Coin::Penny, it returns 1 cent.
     • For Coin::Nickel, it returns 5 cents.
     • For Coin::Dime, it returns 10 cents.
     • For Coin::Quarter, it returns 25 cents.“`rust
       // Define an enum for different US coins
       enum Coin
       Penny,
       Nickel,
       Dime,
       Quarter,

// Define a function to return the value of a coin in cents
fn value_in_cents(coin: Coin) -> u8
match coin
Coin::Penny => 1,
Coin::Nickel => 5,
Coin::Dime => 10,
Coin::Quarter => 25,

**Explanation:**

1. We define an enum named `Coin` with four variants: `Penny`, `Nickel`, `Dime`, and `Quarter`. This enum represents different types of US coins.

2. We define a function named `value_in_cents` that takes a `Coin` as input and returns a u8 (unsigned 8-bit integer) representing the value of the coin in cents.

3. Inside the `value_in_cents` function, we use a `match` statement to check the variant of the input `coin`. Based on the variant, we return the corresponding value in cents:
   - For `Coin::Penny`, we return 1 cent.
   - For `Coin::Nickel`, we return 5 cents.
   - For `Coin::Dime`, we return 10 cents.
   - For `Coin::Quarter`, we return 25 cents.

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The Only Options Trading Book