Watch the video about Gauss's Addition in the Resources tab to see how you can use the formula for your function.

Create a function that adds all the numbers together from 1 to n or, if two numbers are given: n to m. The input can be in any order.
gauss([100]) ➞ 5050 # From the video
gauss([5001, 7000]) ➞ 12001000 # Also ^^
gauss([1975, 165]) ➞ 1937770for or while loop.