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Core Intermediate

07 Ownership

The heart of Rust. These functions take ownership when they shouldn't -- borrow instead, so the caller keeps its values.

Step 2 / 3

Fix excite to take &mut String and push '!' onto it in place.

Hints

07_ownership.rs

// Fix the type, then push '!' onto the string in place.
fn excite(s: &String) {
    // s.push('!');
}

// Fix the type, then push '!' onto the string in place.
fn excite(s: &String) {
    // s.push('!');
}

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

Reveal solution

fn excite(s: &mut String) {
    s.push('!');
}