Merge pull request #6 from AmanShrivastava2710/master

Create binary_search.py

Python/binary_search.py

@@ -0,0 +1,37 @@
+# Python 3 program for recursive binary search.
+
+
+# Returns index of x in arr if present, else -1
+def binary_search(arr, low, high, x):
+
+	if high >= low:
+
+		mid = (high + low) // 2
+
+
+		if arr[mid] == x:
+			return mid
+
+
+		elif arr[mid] > x:
+			return binary_search(arr, low, mid - 1, x)
+
+
+		else:
+			return binary_search(arr, mid + 1, high, x)
+
+	else:
+
+		return -1
+
+
+arr = [ 2, 3, 4, 10, 40 ]
+x = 10
+
+
+result = binary_search(arr, 0, len(arr)-1, x)
+
+if result != -1:
+	print("Element is present at index", str(result))
+else:
+	print("Element is not present in array")