diff --git a/sum_of_array b/sum_of_array
new file mode 100644
index 00000000..6e4d7679
--- /dev/null
+++ b/sum_of_array
@@ -0,0 +1,26 @@
+//calculating the sum of array by dynamic memory allocation
+#include <bits/stdc++.h>
+using namespace std;
+int getSum(int* arr, int n){
+    int sum=0;
+    for(int i=0;i<n;i++){
+        sum+=arr[i];
+    }
+    return sum;
+}
+ 
+int main(){
+ 
+        int n;
+        cin>>n;
+        //dyanimically allocation of memory to array
+        int* arr=new int[n];
+        for(int i=0;i<n;i++){
+            cin>>arr[i];
+        }
+
+        cout<<getSum(arr,n);
+
+ 
+    return 0;
+}