new_contents: # Python Program - Add Two Numbers
  while True:
  	print("Enter '0' for exit.")
  	print("Enter two numbers: ")
  	val1 = int(input())
  	val2 = int(input())
  	if val1 == 0:
  		break
  	else:
  		sum = val1 + val2
  		print("Sum of the given two number:",sum,"\n")
  
subject: Create add.py