Basic Error Handling with Option

Snippet

Basic Error Handling with Option

Rust uses the Option enum to represent a value that might be missing, instead of using null. 'match' is used to safely handle both the presence (Some) and absence (None) of the value.

snippet.rs
rust
fn main() {
    let some_value = Some(5);
    let no_value: Option<i32> = None;
 
    match some_value {
        Some(val) => println!("Value: {val}"),
        None => println!("No value found"),
    }
}

Breakdown

let some_value = Some(5);

Wraps the integer 5 in the 'Some' variant of the Option enum.

match some_value {

Starts a pattern match to inspect the contents of the Option.

Some(val) => ...

Executes this branch if the value exists, binding it to 'val'.

Previous snippet Next snippet

From your library

Basic Error Handling with Option

Related