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def fibonacci(n):
# Base cases
if n <= 0:
return 0
elif n == 1:
return 1
# Recursive case
else:
return fibonacci(n-1) + fibonacci(n-2)

This recursive implementation follows the mathematical definition of Fibonacci numbers where each number is the sum of the two preceding ones. I've included base cases for n ≤ 0 and n = 1. Note that this implementation is simple but not efficient for large values due to...

|def fibonacci(n): # Base cases if n <= 0: return 0 elif n == 1: return 1 # Recursive case else: return fibonacci(n-1) + fibonacci(n-2)This recursive implementation follows the mathematical definition of Fibonacci numbers where each number is the sum of the two preceding ones. I've included base cases for n ≤ 0 and n = 1. Note that this implementation is simple but not efficient for large values due to...