2.9. Syntax Increment Operators

• += - Incremental addition

• -= - Incremental subtraction

• *= - Incremental multiplication

• **= - Incremental power

• /= - Incremental true division

• //= - Incremental floor division

• %= - Incremental modulo division

In Python for each operator there is also an increment version of it. However, most of a time only += and -= are used. Others uses are rare.

2.9.1. Incremental Addition

>>> x = 10
>>> x = x + 1
>>>
>>> print(x)
11

>>> x = 10
>>> x += 1
>>>
>>> print(x)
11

2.9.2. Incremental Subtraction

>>> x = 10
>>> x -= 1
>>>
>>> print(x)
9

2.9.3. Prefix and Postfix Notation

In other programming languages you may find postfix and prefix increment notation. There is no such thing in Python.

>>> x = 1
>>> x++
Traceback (most recent call last):
SyntaxError: invalid syntax

>>> x = 1
>>> ++x
1