The Fibonacci sequence begins with 0 and then 1 follows. All subsequent values are the sum of the previous two, for example: 0, 1, 1, 2, 3, 5, 8, 13. Complete the fibonacci() function, which takes in an index, n, and returns the nth value in the sequence. Any negative index values should return-1. Ex: If the input is: 7 he output is: fibonacci (7) is 13 Note: Use recursion and DO NOT use any loops.
The Fibonacci sequence begins with 0 and then 1 follows. All subsequent values are the sum of the previous two, for example: 0, 1, 1, 2, 3, 5, 8, 13. Complete the fibonacci() function, which takes in an index, n, and returns the nth value in the sequence. Any negative index values should return-1. Ex: If the input is: 7 he output is: fibonacci (7) is 13 Note: Use recursion and DO NOT use any loops.
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
![main.py
Load default template...
1 def fibonacci(n):
2
3
4
if n<0:
return
-1"
7
elif n == 1:
return 1
elif n == 2:
10
return 1
11
else:
12
return fibonacci(n-1)+fibonacci(n-2)
13
main_":
int (input ())
14 if
name
==
15
start num =
print('fibonacci({}) is {}'.format (start_num, fibonacci(start_num)))
16](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fccf0375c-829a-4c56-b9cd-8f855664efa5%2Fbc8d982a-789e-4a06-a113-68825d5a0f39%2Fkevj7wa_processed.jpeg&w=3840&q=75)
Transcribed Image Text:main.py
Load default template...
1 def fibonacci(n):
2
3
4
if n<0:
return
-1"
7
elif n == 1:
return 1
elif n == 2:
10
return 1
11
else:
12
return fibonacci(n-1)+fibonacci(n-2)
13
main_":
int (input ())
14 if
name
==
15
start num =
print('fibonacci({}) is {}'.format (start_num, fibonacci(start_num)))
16
![The Fibonacci sequence begins with 0 and then 1 follows. All subsequent values are the sum of the previous two, for example: 0, 1, 1, 2, 3,
5, 8, 13. Complete the fibonacci() function, which takes in an index, n, and returns the nth value in the sequence. Any negative index values
should return -1
Ex: If the input is:
7
the output is:
fibonacci (7) is l3
Note: Use recursion and DO NOT use any loops.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fccf0375c-829a-4c56-b9cd-8f855664efa5%2Fbc8d982a-789e-4a06-a113-68825d5a0f39%2Fubd6xj_processed.jpeg&w=3840&q=75)
Transcribed Image Text:The Fibonacci sequence begins with 0 and then 1 follows. All subsequent values are the sum of the previous two, for example: 0, 1, 1, 2, 3,
5, 8, 13. Complete the fibonacci() function, which takes in an index, n, and returns the nth value in the sequence. Any negative index values
should return -1
Ex: If the input is:
7
the output is:
fibonacci (7) is l3
Note: Use recursion and DO NOT use any loops.
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