diff --git a/Binary Search/sum of n numbers/sum.cpp b/Binary Search/sum of n numbers/sum.cpp
new file mode 100644
index 0000000..250eca7
--- /dev/null
+++ b/Binary Search/sum of n numbers/sum.cpp	
@@ -0,0 +1,9 @@
+#include<iostream>
+using namespace std;
+int main() {
+   int n, sum;
+   cin>>n;
+   sum = n*(n+1)/2;
+   cout<<"Sum of first "<<n<<" natural numbers is "<<sum;
+   return 0;
+}
\ No newline at end of file