Add iterative binary search implementation

Implement iterative binary search algorithm.

Author: KushDutta23

maths/binary_search_iterative.py

@@ -0,0 +1,25 @@
+"""
+Binary Search (Iterative)
+Time Complexity: O(log n)
+Space Complexity: O(1)
+"""
+
+def binary_search(arr, target):
+    left, right = 0, len(arr) - 1
+
+    while left <= right:
+        mid = (left + right) // 2
+        if arr[mid] == target:
+            return mid
+        elif arr[mid] < target:
+            left = mid + 1
+        else:
+            right = mid - 1
+
+    return -1
+
+
+if __name__ == "__main__":
+    arr = [1, 3, 5, 7, 9, 11]
+    target = 7
+    print(binary_search(arr, target))