Final answer:
To comment out multiple lines in Python, use either triple quotes for a block comment or a keyboard shortcut in an IDE to add a hash symbol at the start of each line.
Step-by-step explanation:
To comment out multiple lines in Python at once, you have two common options: Use the triple quotes (""" or ''') to create a multi-line string, which Python will interpret as a block comment. If you're using an IDE or a text editor, you can often highlight multiple lines and use a shortcut to comment them out all at once. For example, in many editors, you can press Ctrl + / on Windows or Cmd + / on Mac, and the editor will automatically prefix each selected line with the hash symbol (#).
Here's an example of using triple quotes to comment out code: print("This line is commented out.") print("So is this one.") This code won't execute when you run your Python script because it's been turned into a string that's not assigned to any variable.