diff --git a/leaf sum binary tree.cpp b/leaf sum binary tree.cpp
new file mode 100644
index 0000000..4ea0d44
--- /dev/null
+++ b/leaf sum binary tree.cpp	
@@ -0,0 +1,48 @@
+#include<bits/stdc++.h>
+using namespace std;
+
+struct Node
+{
+    int data;
+    Node *left,*right;
+    
+    public:
+    Node(int key)
+    {
+        data=key;
+        left=right=NULL;
+    }
+};
+
+int leaf_traversal(Node *root)   // using preorder traveral
+{
+    if(root==NULL)
+    {
+        return 0;
+    }
+    int sum=0;
+    if(root->left==NULL &&  root->right==NULL)
+    {
+        sum+= root->data;
+    }
+    
+    return sum+leaf_traversal(root->left)+leaf_traversal(root->right);          
+}
+
+
+
+int main()
+{
+    struct Node* root=new Node(10);
+    root->left=new Node(20);
+    root->right=new Node(30);
+    root->right->left=new Node(40);
+    root->right->right=new Node(50);
+    root->right->right->left=new Node(11);
+
+    
+   cout<<leaf_traversal(root)<<endl;
+}
+
+
+