Python help requested

Write a function named sum_between, that takes two arguments (you can safely assume that both arguments will always be integers, and you can safely assume that the first argument will be less than or equal to the second argument). When this function is called, it should return the sum of all the integers between the two arguments passes to it. If both arguments are of equal value, then the function will return this value.

Your submission must define at least 1 function and use at least 1 loop.

Examples:

sum_between(0, 0) will return 0

sum_between(1, 2) will return int 3

sum_between(5, 10) will return 45