input: Write a python function to create an Employee class that stores name, address, and salary, and includes a method to display employee details.
  assert employee.name == "John Doe"
  assert employee.address == "NYC"
  assert employee.salary == "10000"
output: class Employee:
      def __init__(self, name, address, salary):
          self.name = name
          self.address = address
          self.salary = salary
  
      def display_employee_details(self):
          print(f"Name: {self.name}")
          print(f"Address: {self.address}")
          print(f"Salary: {self.salary}")
  
  # Example usage:
  employee = Employee("John Doe", "NYC", "10000")
  employee.display_employee_details()
  
  assert employee.name == "John Doe"
  assert employee.address == "NYC"
  assert employee.salary == "10000"