Addition

Download python eBook

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]

Stats

Contributors: 11
2016-12-29
Licensed under: CC-BY-SA

Not affiliated with Stack Overflow
Rip Tutorial: info@zzzprojects.com

Download eBook