Deleting a Node by passing data in LInkedList

19:26

Deleting a Node by passing data in LInkedList:-

The node can be deleted by passing the data value in a function.Here we have three pointers one to traverse the list other to point current node and third one to point previous of current node.



//deleting a given key
 public Node deleteKeyNode(Node head,int key)
 {
  //traverse pointer
  Node temp=head;
  //previous pointer
  Node prevtemp=temp;
  
  while(temp!=null)
  {
   //when key is at head position
   if(key==head.data)
   {
    head=head.next;
    System.out.println("head is deleted");
    return head;
   }
   
   //when key is at any position other than head
   if(temp.data==key)
   {
    prevtemp.next=temp.next;
    temp.next=null;
    temp=prevtemp; 
   }
   prevtemp=temp;
   temp=temp.next;
  }
  return head;
 }

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