[Golang] Even Fibonacci Numbers - Problem 2 - Project Euler

Problem: [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:

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:

the sum of the even-valued terms below 4,000,000 is 4613732

Run Code on Go Playground

package main

import (
      "fmt"
)

func main() {
      var a, b, sum uint64 = 1, 2, 2
      for a+b < 4000000 {
              next := a + b
              //fmt.Println(next)
              if next%2 == 0 {
                      sum += next
              }
              a = b
              b = next
      }
      fmt.Println("the sum of the even-valued terms below 4,000,000 is", sum)
}

Tested on: Go Playground

References: