Create fibonacci_iterative.rs

Author: metacoder87

src/rust/fibonacci_iterative.rs

@@ -0,0 +1,21 @@
+fn fibonacci_iterative(n: u32) -> u64 {
+    if n <= 1 {
+        return n as u64;
+    }
+
+    let mut a: u64 = 0;
+    let mut b: u64 = 1;
+
+    for _ in 2..=n {
+        let temp = a;
+        a = b;
+        b += temp;
+    }
+
+    b
+}
+
+fn main() {
+    let index = 15;
+    println!("Fibonacci (iterative) of {} is: {}", index, fibonacci_iterative(index));
+}