Have a problem in the insertion in the linklist?

[AnagJohari]

Actualy i have a prob in the begaining to add the node in the linklist
i write the following code
i make a display fucnction which display all the value of linklist
i check the value in display function by using printf
by using following statement

printf("test=%d",current->next->no)

i get the expected ans from this statement
after that
i use

while(current->next!=null)

this loop is not working the control is not gone under this statement
if currnet->next->no is shown a value that means
current->next use a pointer which points to the value
thatmeans its not null.
why

current->next =null

i shown
help me guys

[weaknessforcats]

I would base logic on current rather than current->next.

Suppose your linked list is 1 followed by 2.

When I am on the node with 2, then current->next is null so I don't process the 2. That is, I miss the least element of the list.

After I process the 2, then current becomes
current->next. That is, current becomes null.

while (current)
{
   /* do stuff */
   current = current->next;
}

Now when you leave the loop, the last node was processed.