input: When provided with a list of float numbers and a threshold value, the function `has_close_elements` should determine whether there are any two numbers in the list that are closer than the given threshold. If such numbers exist, it should return True; otherwise, it should return False.
  
  Given the following definition and examples, please generate a user-friendly instruction which could be used for teaching the `has_close_elements` function:
  
  
  from typing import List
  
  def has_close_elements(numbers: List[float], threshold: float) -> bool:
      """ Check if in given list of numbers, are any two numbers closer to each other than
      given threshold.
      >>> has_close_elements([1.0, 2.0, 3.0], 0.5)
      False
      >>> has_close_elements([1.0, 2.8, 3.0, 4.0, 5.0, 2.0], 0.3)
      True
      """
  
  
  ### Instruction:
  Create a Python function to determine if any two numbers within a given list are closer in value than a specified threshold. Your function should return `True` if such a pair exists in the list, otherwise it should return `False`. Provide examples to demonstrate the function's expected behavior.
output:     
  def has_close_elements(numbers: List[float], threshold: float) -> bool:
      for i in range(len(numbers)):
          for j in range(i + 1, len(numbers)):
              if abs(numbers[i] - numbers[j]) < threshold:
                  return True
      return False
  