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  1. def sum_tail(n, s = 0):
  2.  
  3. 	if n == 0:
  4.  
  5. 	   return s
  6.  
  7. 	else:
  8.  
  9. 	   return sum(n // 10, n % 10 + s)	
  10.  
  11. def sum( n ):
  12.  
  13. 	if n == 0:
  14.  
  15. 	   return 0
  16.  
  17. 	else:
  18.  
  19. 	   return n % 10 + sum(n // 10)
  20.  
  21.  
  22. def main():
  23.  
  24.     n = int(input("n="))
  25.  
  26.     print(sum_tail(n)) 
  27.  
  28. main()
Runtime error #stdin #stdout #stderr 0.15s 23592KB
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12345
stdout
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n=
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Traceback (most recent call last):
  File "./prog.py", line 28, in <module>
  File "./prog.py", line 26, in main
  File "./prog.py", line 9, in sum_tail
TypeError: sum() takes 1 positional argument but 2 were given
https://ideone.com/tfaBWg
7C Sum of digits using Tail Recursion
language:
Python 3 (python  3.9.5)
created:
3 years ago
visibility:
secret

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