[GO][ProjectEuler] Problem 2

https://projecteuler.net/problem=2

Problem

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

Code

package main

import "fmt"

func main() {
    a := 1
    b := 2
    c := 0
    sum := 2
    for a < 4000000 {
        c = a + b
        a = b
        b = c
        if c%2 == 0 {
            sum += c
        }
    }
    fmt.Println(sum)
}