Exercise 9: A Centred Banner — Possible Solution
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print(f"{'MENU':-^20}")

Output:
--------MENU--------

WHY THIS WORKS AS AN ANSWER
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The format spec :-^20 has three parts: "-" is the fill character to
pad with (instead of the default space), "^" means centre-align, and
20 is the total field width. Python centres "MENU" (4 characters)
inside a 20-character field and fills every remaining position with
dashes. 20 - 4 = 16 splits evenly, so both sides get exactly 8 dashes.
Had the total width been odd instead (e.g. 21), the split wouldn't
divide evenly, and Python's centring puts the extra fill character on
the right side rather than the left.