2.go

package main

// Find the sum of all even numbers in the Fibonacci sequence below 4mil
import (
	"fmt"
	"math"
)

func is_even(x float64) bool {
	var result bool = false
	if math.Remainder(x, 2) == 0 {
		result = true
	}
	return result
}

func main() {
	var x int = 1
	var y int = 2
	var sum int = 0

	for z := 0; z < 4000000; {
		if is_even(float64(y)) {
			sum = sum + y
		}
		z = x + y
		x = y
		y = z
	}
	fmt.Printf("Sum: %d\n", sum)
}