project_euler.problem_002.sol5

Project Euler Problem 2: https://projecteuler.net/problem=2

Even Fibonacci Numbers

Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:

1, 2, 3, 5, 8, 13, 21, 34, 55, 89, …

By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.

References:

• https://en.wikipedia.org/wiki/Fibonacci_number

Functions

solution(→ int)

Returns the sum of all even fibonacci sequence elements that are lower

Module Contents

project_euler.problem_002.sol5.solution(n: int = 4000000) → int

Returns the sum of all even fibonacci sequence elements that are lower or equal to n.

>>> solution(10)
10
>>> solution(15)
10
>>> solution(2)
2
>>> solution(1)
0
>>> solution(34)
44