1 --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:
2 --1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
3 --By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.
4 function list_iter()
5 local n = 1000000
6 local i = 1
7 local j = 0
8 return function()
9 if(i < n) then
10 tmp = i + j
11 j = i
12 i = tmp
13 return i
14 end
15 end
16 end
17
18 local sum = 0;
19 for i in list_iter() do
20 if(i % 2 == 0) then sum = sum + i end
21 end
22 print(sum)
