Tuple pattern

You’ve already been using another bonus pattern — did you recognize it? The tuple isn’t just a series of comma-separated values between parentheses: it’s actually

comma-separated patterns. In the example tuple pattern, (something, 0, 0), the interior patterns are (identifier, expression, expression).

You’ll learn about expression patterns at the end of this chapter. For now, the important takeaway is that the tuple pattern combines many patterns into one and helps you write terse code.