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fibonacci.py
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fibonacci.py
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# Fibonacci tool
# This script only works with Python3!
import time
def getFibonacciIterative(n: int) -> int:
"""
Calculate the fibonacci number at position n iteratively
"""
a = 0
b = 1
for i in range(n):
a, b = b, a + b
return a
def getFibonacciRecursive(n: int) -> int:
"""
Calculate the fibonacci number at position n recursively
"""
a = 0
b = 1
def step(n: int) -> int:
nonlocal a, b
if n <= 0:
return a
a, b = b, a + b
return step(n - 1)
return step(n)
def compareFibonacciCalculators(n: int) -> None:
"""
Interactively compare both fibonacci generators
"""
startI = time.clock()
resultI = getFibonacciIterative(n)
endI = time.clock()
startR = time.clock()
resultR = getFibonacciRecursive(n)
endR = time.clock()
s = "{} calculting {} => {} in {} seconds"
print(s.format(
"Iteratively", n, resultI, endI - startI
))
print(s.format(
"Recursively", n, resultR, endR - startR
))