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Python Data Structures and Algorithms - Recursion: Calculate the geometric sum

Python Recursion: Exercise-9 with Solution

Write a Python program to calculate the geometric sum of n-1.
Note : In mathematics, a geometric series is a series with a constant ratio between successive terms.

Example :
harmonic series

Sample Solution:-

Python Code:

def geometric_sum(n):
  if n < 0:
    return 0
  else:
    return 1 / (pow(2, n)) + geometric_sum(n - 1)
 
print(geometric_sum(7))
print(geometric_sum(4))

Sample Output:

1.9921875                                                                                                     
1.9375 

Flowchart:

Flowchart: Recursion: Calculate the geometric sum.

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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