Makerspace

Booleans (or bools) represent one of two values: True or False. You can use Python’s comparison operators to compare two numbers:

• > Greater than
• < Less than
• >= Greater than or equal to
• <= Less than or equal to
• == Equal to
• != Not equal to

Example using “greater than” operator:

print(43 > 21)

Output:

True

Example using “equals to” operator:

print(43 == 21)

Output:

False

In the order of operations, arithmetic operators are evaluated before comparison operators:

print(78 <= 3 * 26)

Output:

True

Booleans can be combined or negated using logical operators:

• and
• or
• not

(0 == 1) or (53 > 20)

Output:

True

(67 > 3) and (34 != 34)

Output:

False

Boolean values can be assigned to variables just like numbers and strings:

b = (54 < 22)
c = not b
print(c)

Output:

True

Exercises

1. Write a single line of code to determine if 241 times 4.5 is greater than or equal to 3281 divided by 3.

   Hint: use a comparison operator.

2. The variable red_led is being used as a bool to control the red light on a circuit board. If it’s set to True then then light will be on. If it’s set to False then the light will be off. Write a single line of code to flip the state of the light (i.e., if it’s on, turn it off; if it’s off, turn it on).

   Hint: use a logical operator, not an if/else block.