# 3.1: Boolean Expressions

- Page ID
- 3023

A *boolean expression* is an expression that is either true or false. The following examples use the operator `==`

, which compares two operands and produces `True`

if they are equal and `False`

otherwise:

```
>>> 5 == 5
True
>>> 5 == 6
False
{}
```

`True`

and `False`

are special values that belong to the class `bool`

; they are not strings:

```
>>> type(True)
<class 'bool'>
>>> type(False)
<class 'bool'>
```

The `==`

operator is one of the *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
x is y # x is the same as y
x is not y # x is not the same as y
```

Although these operations are probably familiar to you, the Python symbols are different from the mathematical symbols for the same operations. A common error is to use a single equal sign (`=`

) instead of a double equal sign (`==`

). Remember that `=`

is an assignment operator and `==`

is a comparison operator. There is no such thing as `=<`

or `=>`

.