(fibonacci)Solved the Fibonacci problem using the iterative approach

Author: polyakh

.idea/.gitignore

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+/**
+ * @param {number} n
+ * @return {number}
+ */
+// The Iterative Approach
+var fibIterativeApproach = function (n) {
+    if (n <= 1) return n;
+    let prev1 = 0, prev2 = 1, current;
+
+    for (let i = 2; i <= n; i++) {
+        current = prev1 + prev2;
+        prev1 = prev2;
+        prev2 = current;
+    }
+
+    return current;
+};
+// fibIterativeApproach(5)