Multiples of seven

Write a program that receives an integer \(N\) and generates all the multiples of 7 between 1 and \(N\). Run the following test cases to test your program:

test case ID	inputs	expected outputs
1	0	there are no multiples of 7
2	3	there are no multiples of 7
3	-5	there are no multiples of 7
4	-15	-7, -14
5	18	7, 14
6	57	7, 14, 21, 28, 35, 42, 49, 56

Insist that the students test their programs by giving them example
test cases in a table. Again the chosen values will make them aware
that there program should also work for negative numbers.