title: What is the purpose of dollar sign in this Python3 string formatting expression?
body: <p><code>"(%d goals, $%d)" % (self.goals, self.penalties)</code></p>
  
  <p>Original question: <a href="https://stackoverflow.com/questions/13945749/string-formatting-in-python-3">String Formatting in Python 3</a></p>
  
  <p>Python3 Format String Syntax Ref: <a href="https://docs.python.org/3/library/string.html#format-string-syntax" rel="noreferrer">https://docs.python.org/3/library/string.html#format-string-syntax</a></p>