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Python Data Structures and Algorithms - Recursion: Sum of a non-negative integer

Python Recursion: Exercise-6 with Solution

Write a Python program to get the sum of a non-negative integer.

Sample Solution:

Python Code:

def sumDigits(n):
  if n == 0:
    return 0
  else:
    return n % 10 + sumDigits(int(n / 10))

print(sumDigits(345))
print(sumDigits(45))

Sample Output:

12                                                                                                            
9 

Flowchart:

Flowchart: Recursion: Sum of a non-negative integer.

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Previous: Write a Python program to solve the Fibonacci sequence using recursion.
Next: Write a Python program to calculate the sum of the positive integers of n+(n-2)+(n-4)... (until n-x =< 0).

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Python: Tips of the Day

Decapitalizes the first letter of a string:

Example:

def tips_decapitalize(s, upper_rest=False):
  return s[:1].lower() + (s[1:].upper() if upper_rest else s[1:])
print(tips_decapitalize('PythonTips'))
print(tips_decapitalize('PythonTips', True)) 

Output:

pythonTips
pYTHONTIPS