Sum of n natural numbers using while loop in python Sum of n natural numbers using while loop in python. In Python programming language, the sum of natural numbers. The natural numbers will be printed by this Python application. This software is essentially an extension program, but it adds in advanced features num = 18 if num < 0: print("Sum of the natural number") else: sum = 0 while(num > 0): sum += num num -= 1 print("The sum is", sum) OutputThe sum is 171