Often, the conditions you want to check in your conditional statement will require more than one boolean expression to cover. In these cases, you can build larger boolean expressions using boolean operators. These operators (also known as logical operators) combine smaller boolean expressions into larger boolean expressions.
There are three boolean operators that we will cover:
Let’s start with
and combines two boolean expressions and evaluates as
True if both its components are
Consider the example:
Oranges are a fruit and carrots are a vegetable.
This boolean expression is comprised of two smaller expressions,
oranges are a fruit and
carrots are a vegetable, both of which are
True and connected by the boolean operator
and, so the entire expression is
Let’s look at an example of some AND statements in Python:
(1 + 1 == 2) and (2 + 2 == 4) # True (1 > 9) and (5 != 6) # False (1 + 1 == 2) and (2 < 1) # False (0 == 10) and (1 + 1 == 1) # False
Notice that in the second and third examples, even though part of the expression is
True, the entire expression as a whole is
False because the other statement is False. The fourth statement is also
False because both components are
Set the variables
statement_two equal to the results of the following boolean expressions:
(2 + 2 + 2 >= 6) and (-1 * -1 < 0)
(4 * 2 <= 8) and (7 - 1 == 6)
Let’s return to Calvin Coolidge’s Cool College. 120 credits aren’t the only graduation requirement, you also need to have a GPA of 2.0 or higher.
if statement so that it checks to see if a student meets both requirements using an
If they do, return the string:
"You meet the requirements to graduate!"