Core Intermediate

08  Error handling

Rust models absence and failure in the type system: return an Option for a maybe-missing char, then use ? to propagate parse errors.

Step 1 / 2

Return the first character, or None for "", in first_char.

Hints
  • s.chars().next() gives Option<char>.
08_error_handling.rs
Reset to starterCompiled in a sandbox; hidden checks must pass.
Reveal solution
fn first_char(s: &str) -> Option<char> {
    s.chars().next()
}