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Core Beginner

04 Strings & slices

Two string types: String owns its text, &str borrows a view of it. Slice out the first word, then build a fresh String from a borrowed one.

Step 2 / 2

Build an owned String in shout: uppercase the input and add "!".

Hints

04_strings.rs

// "hey" -> "HEY!" -- an owned String built from a borrowed &str
fn shout(s: &str) -> String {
    todo!()
}

// "hey" -> "HEY!" -- an owned String built from a borrowed &str
fn shout(s: &str) -> String {
    todo!()
}

Reset to starterCompiled in a sandbox; hidden checks must pass.

Reveal solution

fn shout(s: &str) -> String {
    format!("{}!", s.to_uppercase())
}