Print Full Name (Optional Last)

Optional properties are declared with ? and may be undefined. You’ll accept an object with a required first and an optional last, and build a full name. This teaches how to guard optional properties before using them.

Your Task

• Complete the function printFullName(p: { first: string; last?: string }): string.
• If last exists, return first + ' ' + last.
• Otherwise, return just first.

Examples

• printFullName({ first: 'Bob' }) → 'Bob'
• printFullName({ first: 'Alice', last: 'Alisson' }) → 'Alice Alisson'