text: """
  Python program to reverse a number.
  The reverse of a number is a number that is obtained when a number is traversed from right to left.
  """
  
  # Function to do reverse 
  
  def reverse(n):
      # Initializing rev as 0
  
      rev = 0
      while True:
          if n == 0:
              break
          # Adding the last digit
  
          rev = rev * 10 + n % 10
          # Removing the last digit
  
          n = n // 10
      return rev
  
  if __name__ == '__main__':
      # Taking input from user
  
      n = int(input('Enter the number :'))
      # Printing the output
  
      print ("The reverse of the given number is: {} ".format(reverse(n)))
  
  """
  Time Complexity - O(n), where 'n' is the number of digits in the number.
  Space Complexity - O(1)
  
  SAMPLE INPUT AND OUTPUT
  SAMPLE I
  
  INPUT
  Enter the number: 1234
  
  OUTPUT
  The reverse of the given number is: 4321
  
  """
  
  