a triangular number is a number that is the sum of the integers from 1 to some integer n. thus 1 is a triangular number because it is the sum of the integers from 1 to 1; 6 is a triangular number because 1 + 2 + 3 = 6.given the non-negative integer n, create a list of the first n triangular numbers. thus if n was 5, the list would be: {1, 3, 6, 10, 15}.assign the list to variable traingulars
