Python uses short-circuit evaluation for and and or: With and: if the first condition is False, Python doesn't check the second. The result is already False.
With or: if the first condition is True, Python doesn't check the second. The result is already True. This matters when the second condition has side effects or could cause errors: python if x != 0 and 10 / x > 2: print("Valid") If x is , the first condition is False, so Python never tries 10 / x (which would crash).
This is a common pattern to guard against errors.