# Even Fibonacci Numbers

January 03, 2020 • ☕️ 1 min read

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.

```
const solutionTwo = () => {
const upperLimit = 4000000;
let fibonacciArray = [1, 2];
for (
let i = 3;
i <= upperLimit;
i += fibonacciArray[fibonacciArray.length - 2]
) {
fibonacciArray.push(i);
}
return fibonacciArray.reduce((a, b) => (b % 2 === 0 ? a + b : a + 0), 0);
};
```