5.3 Logical Operators

3 practice questionsNot yet reviewed

Notes

Combine conditions with and, or and not.

A and B is True only if both are True.
A or B is True if at least one is True.
not A flips True to False and False to True.
Example: age >= 13 and age <= 18 is True for ages 13 through 18.
Evaluation order: not, then and, then or. Use parentheses to be clear.
Example: with x = 5, x > 2 and x < 4 is False, but x > 2 or x < 4 is True.

What does print(3 > 1 and 2 > 5) display?

The second part is False, and and needs both parts True.

What does print(not (4 == 4)) display?

4 == 4 is True, and not flips it to False.

Which condition is True when a number n is between 10 and 20, inclusive?

Both bounds must hold, and inclusive means using >= and <=. The or version is True for every number.