Type Conversion Solutions

1. Define a method, #two_digit_sum, that accepts a two-digit integer as an argument. Your method should return the sum of the two digits.

    def two_digit_sum(int)
      first_digit = int.to_s[0]
      second_digit = int.to_s[1]
   
      first_digit.to_i + second_digit.to_i
    end
   

2. Define a method, #orders_of_magnitude, that accepts an integer as an argument. Your method should return the number of digits in the integer.

    def orders_of_magnitude(int)
      int.to_s.length
    end
   

3. Define a method, #accurate_division, that accepts two integers as arguments. Your method should return the quotient of the two integers (rounding to 3 decimal places).

    def accurate_division(int1, int2)
      quotient = int1.to_f / int2
      quotient.round(3)
    end
   

4. Define a method, #two_digit_format, that accepts an integer, n, and returns a string version of that integer. If the integer has a single digit, you should append a 0. You can assume that n will always be two or fewer digits. Hint: try creating a string using '0' + n.to_s, then use #slice to get the last two digits!

    def two_digit_format(n)
      string_number = '0' + n.to_s
      string_number[-2, 2]
    end
   

5. Define a method, #time_string that accepts 3 arguments: hours, minutes, and seconds (all integers). Convert these integers into one contiguous time string that has the following format:

    "hh:mm:ss"
   

   Use the method, #two_digit_format, to help you do this!

    def time_string(hours, minutes, seconds)
      hour_string = two_digit_format(hours)
      minute_string = two_digit_format(minutes)
      second_string = two_digit_format(seconds)
   
      "#{hour_string}:#{minute_string}:#{second_string}"
    end