sum

Adds up all the numbers in a list.

Synopsis

sum(list)

Description

sum adds every item, starting from 0. For an empty list it returns 0.

Parameters

Return value

The total, an int or a float.

Example

print(sum([1, 2, 3]))
print(sum(range(1, 101)))
print(sum([]))

It prints:

6
5050
0

Common mistake

print(sum(["a", "b", "c"]))

Python stops with:

TypeError: unsupported operand type(s) for +: 'int' and 'str'

sum adds numbers only. To join strings, use "".join(...).

See also

len, min, max, str.join

sum in the Python documentation