rename directory

02_even_fibonacci_numbers/main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+	end := 4000000
+	nums := GetFibonacciTill(end)
+	fmt.Println("the fibonacci below 4000000 is", nums)
+	sum := 0
+	for _, n := range nums {
+		if IsEvenValue(n) {
+			sum += n
+		}
+	}
+	fmt.Println("event-value sum of numbers in 4000000 is", sum)
+}
+
+func GetFibonacciTill(n int) []int {
+	var ret []int
+	next := 1
+	last := 1
+	for next <= n {
+		add := next
+		ret = append(ret, add)
+		next += last
+		last = add
+	}
+	return ret
+}
+
+func IsEvenValue(n int) bool {
+	return n%2 == 0
+}