Project Euler 2

Question

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.

Solution

package main

import "fmt"

func main() {
	firstNum := 1
	secondNum := 1
	sum := 0
	nextNum := 0
	for nextNum < 4000000 {
		if nextNum%2 == 0 {
			sum = sum + nextNum
		}
		nextNum = firstNum + secondNum
		firstNum = secondNum
		secondNum = nextNum
	}
	fmt.Println("Total is: ", sum)
}