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rust option

Long Llama answered on June 14, 2022 Popularity 10/10 Helpfulness 3/10

answer rust option

rust option

Comment

//Type Option represents an optional value: every Option is either Some and contains a value, or None, and does not.
//Option is an enum consisting of Some and None

fn divide(numerator: f64, denominator: f64) -> Option<f64> {
    if denominator == 0.0 {
        None
    } else {
        Some(numerator / denominator)
    }
}

// The return value of the function is an option
let result = divide(2.0, 3.0);

// Pattern match to retrieve the value
match result {
    // The division was valid
    Some(x) => println!("Result: {x}"),
    // The division was invalid
    None    => println!("Cannot divide by 0"),
}

Popularity 10/10 Helpfulness 3/10 Language rust

Source: doc.rust-lang.org

Tags: rust

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