diff --git a/f4 b/f4
new file mode 100644
index 00000000..39504616
--- /dev/null
+++ b/f4
@@ -0,0 +1,18 @@
+struct Node *addBegin(struct Node *last, int data) 
+{ 
+if (last == NULL) 
+	return addToEmpty(last, data); 
+
+// Creating a node dynamically. 
+struct Node *temp 
+		= (struct Node *)malloc(sizeof(struct Node)); 
+	
+// Assigning the data. 
+temp -> data = data; 
+
+// Adjusting the links. 
+temp -> next = last -> next; 
+last -> next = temp; 
+	
+return last; 
+}