Create FibonacciIterative.kt

Author: metacoder87

src/kotlin/FibonacciIterative.kt

@@ -0,0 +1,23 @@
+// Function to calculate Fibonacci numbers iteratively
+fun fibonacciIterative(n: Int): Long {
+    if (n <= 1) {
+        return n.toLong()
+    }
+
+    var a = 0L
+    var b = 1L
+    var result = 0L
+
+    for (i in 2..n) {
+        result = a + b
+        a = b
+        b = result
+    }
+
+    return result
+}
+
+fun main() {
+    val index = 15
+    println("Fibonacci (iterative) of $index is: ${fibonacciIterative(index)}")
+}