RECURSIVE PYTHON 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 13 Note: Use recursion and DO NOT use any loops

C++ Programming: From Problem Analysis to Program Design
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ISBN:9781337102087
Author:D. S. Malik
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Chapter15: Recursion
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RECURSIVE PYTHON

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 13

Note: Use recursion and DO NOT use any loops.

 

# TODO: Write recursive fibonacci() function
def fibonacci():

if __name__ == "__main__":
    start_num = int(input())
    print('fibonacci({}) is {}'.format(start_num, fibonacci(start_num)))

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