Add task

src/task2 - Even Fibonacci Numbers.js

@@ -0,0 +1,29 @@
+const MAX_LIMIT = 4000000
+
+function fibonacci(index) {
+  if (index === 0) return 0;
+
+  let A = 0;
+  let B = 1;
+
+  for (let i = 0; i < (index - 1); i++) {
+    let C = A + B;
+    A = B;
+    B = C;
+  }
+
+  return B;
+}
+
+let sum = 0;
+let currentNum = 0;
+let i = 0;
+while (currentNum < MAX_LIMIT) {
+  currentNum = fibonacci(i);
+  if (currentNum % 2 === 0) {
+    sum += currentNum;
+  }
+  i++;
+}
+
+console.log(sum);