diff --git a/standarddeviation.cpp b/standarddeviation.cpp
new file mode 100644
index 000000000..6efb24af7
--- /dev/null
+++ b/standarddeviation.cpp
@@ -0,0 +1,44 @@
+#include<iostream>
+#include<vector>
+#include <cmath>
+using namespace std;
+
+int main() {
+    
+    vector<float>s1;//Vector create for storing value dynamically.
+   float sum = 0.0, mean, variance = 0.0, stddev;
+   int n;
+   cin>>n;
+   int i;
+   for( i= 0; i < n; i++)
+   {
+      float value;
+      cin>>value;
+      s1.push_back(value);
+   }
+   for(i = 0; i < n; i++)
+   {
+       sum=sum+s1[i];
+   }
+   
+      
+   mean = sum/5;
+
+   for(i = 0; i < n; i++)
+   variance += pow(s1[i] - mean, 2);
+
+   variance=variance/5;//For variance.
+    
+   stddev = sqrt(variance);//Formula for calculate standard deviation.
+    
+   cout<<"The give stored values:- ";
+    
+   for(i = 0; i < n; i++)
+      {
+          cout<<s1[i]<<" ";
+      }
+    
+      cout<<endl;
+
+      cout<<"Standered deviation:-"<<stddev; //Output.   
+}