Loops Solutions

1. Write a while loop that prints out all the numbers from 1 to 25 inclusive.

    n = 1
   
    while n <= 25
      puts n
      n += 1
    end
   

2. Write an until loop that prints out all of the numbers that are less than 20 and are not divisible by 6.

    n = 1
   
    until n == 20
      puts n unless n % 6 == 0
      n += 1
    end
   

3. Write a method, #sum_up_to(number) that, given a number, sums all the numbers from 1 to that number, inclusive. It should use a while loop internally.

    def sum_up_to(number)
      n = 1
      sum = 0
   
      while n <= number
        sum += n
        n += 1
      end
   
      sum
    end
   

4. Write a method, print_factors(number) that prints all of the factors of a number, including 1 and the number itself. You'll need to use a while loop, a conditional statement, and the modulo operator!

    def print_factors(number)
      possible_factor = 1
   
      while possible_factor <= number
        puts possible_factor if number % possible_factor == 0
        possible_factor += 1
      end
    end