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Adam Lesperance > Project-Euler-0.20 > Project::Euler::Problem::P002

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Module Version: 0.20

# NAME

Project::Euler::Problem::P002 - Solutions for problem 002 - Sum filtered fib numbers

version 0.20

# HOMEPAGE

http://projecteuler.net/index.php?section=problems&id=2

# SYNOPSIS

```    use Project::Euler::Problem::P002;
my \$p2 = Project::Euler::Problem::P002->new;

# DESCRIPTION

This module is used to solve problem #002

This is a simple problem which computes the fib numbers up to a certain maximum and sums all of them that are even (or as implemented here, divisible by every integer in multi_nums)

# ATTRIBUTES

## multi_nums

An array of positive numbers that are used to filter out the fib numbers

Isa

PosIntArray

Default

`[2]`

# SETUP

## Problem Number

`    002`

## Problem Name

`    Sum filtered fib numbers`

## Problem Date

`    2001-10-19`

## Problem Desc

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, ...

Find the sum of all the even-valued terms in the sequence which do not exceed four million.

## Default Input

Max number to go up to

`4,000,000`

`    4,613,732`

## Has Input?

`    Yes`

## Help Message

You can change `multi_nums` to alter the way the program will function. If you are providing custom_input, don't forget to specify the wanted_answer if you know it!

# INTERNAL FUNCTIONS

## Validate Input

The restrictions on custom_input

`    A positive integer`

## Solving the problem

Generate all of the fib numbers up to \$max, filtering them by the multi_nums attribute, and find the sum