Sum of 1-100

[perfringo]

Some other possibilities about getting sum of numbers in range 1 - 100.

You can slightly modify you code by using +=:

>>> x = 0
>>> r = range(1, 101)
>>> for n in r:
...     x += n
...
>>> x
5050

You can iterate directly over range:

>>> x = 0
>>> for n in range(1, 101):
...     x += n
...
>>> x
5050

You can present this code as one-liner:

>>> sum(x for x in range(1, 101))
5050

You can get rid of comprehension and just sum range:

>>> sum(range(1, 101))
5050

However, all above represent brute-force approach. In case of really big numbers 'the right' way to approach this problem is to use triangular numbers:

>>> (100 * (100 + 1)) / 2
5050.0