Example

``````a, b = 1, 2

# Using the "+" operator:
a + b                  # = 3

# Using the "in-place" "+=" operator to add and assign:
a += b                 # a = 3 (equivalent to a = a + b)

import operator        # contains 2 argument arithmetic functions for the examples

operator.add(a, b)     # = 5  since a is set to 3 right before this line

# The "+=" operator is equivalent to:
a = operator.iadd(a, b)    # a = 5 since a is set to 3 right before this line
``````

Possible combinations (builtin types):

• `int` and `int` (gives an `int`)
• `int` and `float` (gives a `float`)
• `int` and `complex` (gives a `complex`)
• `float` and `float` (gives a `float`)
• `float` and `complex` (gives a `complex`)
• `complex` and `complex` (gives a `complex`)

Note: the `+` operator is also used for concatenating strings, lists and tuples:

``````"first string " + "second string"    # = 'first string second string'

[1, 2, 3] + [4, 5, 6]                # = [1, 2, 3, 4, 5, 6]
`````` PDF - Download Python Language for free