input: Write a function to store and print the multiplication table of a given number. The multiplication table should include the results of multiplying the given number by each number from 1 to 10. If the input number is 0, the function should print a message indicating that a positive number is required.
  
  def print_multiplication_table(num):
      if num == 0:
          print("A positive number is required.")
      else:
          for i in range(1, 11):
              print('{0} x {1} = {2}'.format(num, i, num*i))
  
  assert print_multiplication_table(5)==None
  assert print_multiplication_table(0)==None
output: def print_multiplication_table(num):
      if num == 0:
          print("A positive number is required.")
      else:
          for i in range(1, 11):
              print('{0} x {1} = {2}'.format(num, i, num*i))