7.1 Boolean Values and Boolean Expressions

• The Python type for storing true and false values is called bool
• George Boole created Boolean Algebra, which is the basis of all modern computer arithmetic.
• There are only two boolean values
  • True
  • False
• Capitalization is important, since trueand falseare not boolean values
  • (remember Python is case sensitive).
• Boolean values are not strings!

boolean expression

• A boolean expression is an expression that evaluates to a boolean value.
• The equality operator, ==, compares two values
  • produces a boolean value (True or False) related to whether the two values are equal to one another.

Quick Note

• The == operator is one of six common comparison operators; the others are:

x != y               # x is not equal to y
x > y                # x is greater than y
x < y                # x is less than y
x >= y               # x is greater than or equal to y
x <= y               # x is less than or equal to y

• Remember that =is an assignment operator and ==is a comparison operator
• there is no such thing as =<or =>