as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
construct a regular expression to match any single three-digit number.
user
the regular expression to match any single three-digit number is: `\d{3}`  this expression will match exactly three numerical digits in a row.
assistant