Build a function, random_range, that takes 2 parameters, start_num and end_num. OPTIONALLY: If start_num is an array instead (and end_num isn't specified), then it returns a random element from the array
- Example:
- random_range(2,15)
- returns 7
- random_range(1,100)
- returns 85
- random_range(['a','b','c','d','e'])
- returns 'b'
- random_range(2,15)