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

Python Recursion: Exercise-4 with Solution

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

Sample Solution:

Python Code:

def factorial(n):
  if n <= 1:
    return 1
  else:
    return n * (factorial(n - 1))
    
print(factorial(5))

Sample Output: 

120

Flowchart:

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

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Python: Tips of the Day

Maps the values of a list to a dictionary using a function, where the key-value pairs consist of the original value as the key and the result of the function as the value:

Example:

def tips_map_dictionary(itr, fn):
  ret = {}
  for a in itr:
    ret[a] = fn(a)
  return ret
print(tips_map_dictionary([2,4,6], lambda a: a * a))

Output:

{2: 4, 4: 16, 6: 36}

 

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