Fibonacci Series

# Function for nth fibonacci
# number - Dynamic Programming
# Taking 1st two fibonacci numbers as 0 and 1
FibArray = [0, 1]

def fibonacci(n):

	# Check is n is less
	# than 0
	if n < 0:
		print("Incorrect input")
		
	# Check is n is less
	# than len(FibArray)
	elif n < len(FibArray):
		return FibArray[n]
	else:	
		FibArray.append(fibonacci(n - 1) + fibonacci(n - 2))
		return FibArray[n]

# Driver Program
print(fibonacci(9))

# This code is contributed by Saket Modi