Instructions

Write a function sum that consumes a list of numbers and produces the total of all the numbers in the list.

Note:

Hint:

  • Use a while loop.

Write a function divides_all that consumes a list of positive integers seq and a positive integer factor. Your function should produce True if every item in seq is a multiple of factor and False otherwise. The helper function is_multiple has been provided for you.

Note:

Hint:

  • You can return False as soon as you discover an item of seq which is not a multiple of factor.

Write a function remove_zero that uses mutation to remove all zeroes from an input list of numbers.

Note:

Hint:

  • Use remove and in.

Write a function no_zero that consumes a list of numbers and produces a new list formed by removing all the zeroes from the input list. Do not mutate the input.

Note:

Hints:

  • Make sure to initialize your new list outside of the while loop.

Write a function reverse that mutates the input list of numbers by reversing the order of items in the list.

Note:

Hints:

  • You can reverse a list by swapping the first and last items, then the second and second-to-last, and so on.
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