diff --git a/partialsort.cpp b/partialsort.cpp
new file mode 100644
index 0000000..60ce198
--- /dev/null
+++ b/partialsort.cpp
@@ -0,0 +1,20 @@
+//Sorting Algorithm using STL 
+//Partial Sort Method 
+
+#include <bits/stdc++. h>
+using namespace std; 
+
+int main()
+{
+    int a[] = {9,8,7,6,5,4,3,2,1};
+    
+    partial_sort(a, a+4, a+9); 
+    /* now a is 1,2,3,4,9,8,7,6,5  */ 
+    
+    int b[] = {1,5,6,2,4,8,9,3,7};
+    
+    /* sorts b such that first 4 elements are the greatest elements
+    in the array and are in descending order */
+    partial_sort(b, b+4, b+9);  
+    /* now b is  9,8,7,6,1,2,4,3,5 */
+}