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.

link

cevap : 4613732

clear all;
clc;
close all;

number_1 = 1;
number_2 = 2;
sum = number_1 + number_2;

for i=1:(10-2)
    temp = sum;
    sum = sum + number_2;
    sum = temp + sum;
end

clear all;
clc;
close all;

first = 1;
second = 2;
sum = first + second;
new_sum = 0;

for i=1:(32-3)
    first = second;
    second = sum;
    sum = first + second;
    if(mod(sum,2) == 0)
        new_sum = sum + new_sum;
    end
end
% en bastaki 2'yi cift sayilarin toplamina katmadigindan sonda manual olarak toplamak lazim
new_sum = new_sum + 2;