provided is a list of numbers. for each of the numbers in the list, determine whether they are even. if the number is even, add true to a new list called is_even. if the number is odd, then add false.
given a set of candidate numbers a and a target number b, find all unique combinations in a where the candidate numbers sums to b. the same repeated number may be chosen from a unlimited number of times.
given two integers a and b, which can be positive or negative, find the sum of all the integers between including them too and return it. if the two numbers are equal return a or b.