It's useful because it allows you to add together booleans to get a count of how many are true. You can check if two out of three are true with (bool1 + bool2

It's useful because it allows you to add together booleans to get a count of how many are true. You can check if two out of three are true with (bool1 + bool2 + bool3) >= 2 You can do count_negatives = sum(number < 0 for number in numbers)