From b88f7d89d647d05ecac90ad501a067c726ff2251 Mon Sep 17 00:00:00 2001
From: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Date: Mon, 27 Apr 2020 00:34:36 +0000
Subject: [PATCH] updating DIRECTORY.md

---
 DIRECTORY.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/DIRECTORY.md b/DIRECTORY.md
index 045de5f9c..b97b83cca 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -106,6 +106,7 @@
   * [Prime Numbers](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/math/prime_numbers.cpp)
   * [Primes Up To 10^8](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/math/primes_up_to_10^8.cpp)
   * [Sieve Of Eratosthenes](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/math/sieve_of_eratosthenes.cpp)
+  * [Sqrt Double](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/math/sqrt_double.cpp)
 
 ## Operations On Datastructures
   * [Array Left Rotation](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/operations_on_datastructures/Array%20Left%20Rotation.cpp)