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.

**Answer: 4613732**

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var terms = [1, 2] while terms.last! < 4000000 { let numOfTerms = terms.count terms.append(terms[numOfTerms - 1] + terms[numOfTerms - 2]) } let sum = terms.reduce(0) { guard $1 % 2 == 0 else { return $0 } return $0 + $1 } print(sum) |