From eede65a423f0e0d6dc2d15776d95464d0140eca0 Mon Sep 17 00:00:00 2001
From: Sweta Negi <negisweta89@gmail.com>
Date: Tue, 28 Oct 2025 17:00:19 +0530
Subject: [PATCH] Implement node removal and sum methods in linked list

Added methods to remove a node by value and to sum all node values in the linked list.
---
 .../add_and_subtract_nodes_in_linked_list.py  | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/python/add_and_subtract_nodes_in_linked_list.py b/python/add_and_subtract_nodes_in_linked_list.py
index 48ae72b9..fa8c5a2c 100644
--- a/python/add_and_subtract_nodes_in_linked_list.py
+++ b/python/add_and_subtract_nodes_in_linked_list.py
@@ -26,7 +26,40 @@ def subtract(self, value):
         while current:
             current.data -= value
             current = current.next
+            
+    #remove_nod
+     def remove_node(self,value):
+        """Remove first occurence of a node
+        with the given value"""
+          current = self.head
+        
+        #If list is empty
+    if not current:
+        print("List is empty.")
+        return
 
+    #If head node itself holds the value
+    if current.data == value:
+        self.head = current.next
+
+    #If not found
+    if not current:
+        print(f"Value{value}not foundin list.")
+        return
+
+    #unlink the code
+    prev.next = current.next
+    
+    #sum_node
+    def sum_nodes(self):
+        """Return the sum of all node vlaues"""
+         total = 0
+         current = self.head
+         while current:
+             total +=current.data
+             current = current.next
+             return total
+             
     # Print the linked list
     def print_list(self):
         current = self.head
@@ -48,3 +81,10 @@ def print_list(self):
 ll.subtract(5)
 print("After subtracting 5 from each node:")
 ll.print_list()
+
+print("/nRemoving node with value 10.")
+11.remove_node(10)
+11.print_list()
+
+print("\nSum of nodes:",11.sum_nodes())
+