Gauss's Addition

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.

Examples

gauss(100) ➞ 5050 // From the video

gauss(5001, 7000) ➞ 12001000 // Also ^^

gauss(1975, 165) ➞ 1937770

Notes

• Try not to use a for or while loop.
• Try not to create a recursive function.
• Use the formula explained in the video.