Greeting with Optional Title

Optional parameters let you model inputs that may or may not be provided. In TypeScript, an optional parameter x?: T is seen as T | undefined at the type level.

You’ll write a greet function that optionally accepts a title (like 'Dr.' or 'Ms.') and formats the greeting accordingly.

Your Task

• Complete the function greet(name: string, title?: string): string.
• If title is provided, return 'Hello, ' + title + ' ' + name.
• Otherwise, return 'Hello, ' + name.
• Do not log in this problem; return the string.

Examples

• greet('Alex') → 'Hello, Alex'
• greet('River', 'Dr.') → 'Hello, Dr. River'