Find the logic error(s) in the following recursive function, and explain how to correct it (them). This function should find the sum of the values from 0 to n. In [3]: def sum(n): if n == 0: ...: return 0 else: return n + sum(n)
Find the logic error(s) in the following recursive function, and explain how to correct it (them). This function should find the sum of the values from 0 to n. In [3]: def sum(n): if n == 0: ...: return 0 else: return n + sum(n)
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
![Find the logic error(s) in the following recursive function, and explain how to
correct it (them). This function should find the sum of the values from 0 to n.
In [3]: def sum (n):
if n == 0:
...:
return 0
else:
return n + sum (n)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6de97279-0adf-4f7d-8384-8d8d541bac7d%2F0042c92a-424e-47b0-83ed-e29ec786b983%2F3e59fba_processed.png&w=3840&q=75)
Transcribed Image Text:Find the logic error(s) in the following recursive function, and explain how to
correct it (them). This function should find the sum of the values from 0 to n.
In [3]: def sum (n):
if n == 0:
...:
return 0
else:
return n + sum (n)
Expert Solution
Step 1
def sum(n):
if n == 0:
return 0
else:
return n + sum(n)
Logical errors are
If n == 0 then return 0 is fine
What if n is less then 0
So use condition like if n<=0
If(n<=0)
return n;
else
return n+sum(n) ;
Here instead of sum(n) use sum(n-1)
So it will used all but one number every time else it keep on adding same number
Use like this
return n + sum(n-1) ;
So it will add every recursion time
n means last number
and n-1 is last but one number
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