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Thanks a lot everyone. :)

Why exactly do we need double pointers as arguments here? Can't the same be achieved without it? Eg. instead of what you suggested,

node * head = &ptr;
head== ptr;

works the same way, or...

What does a *node_name hold? Since a node is a structure of multiple data types, what does *node_name fetch? I know int *c, *c would fetch the integer stored at address pointed to by c.

Here is a basic program for insertion at the beginning of a LL.


void insert( node **head, int item)
{
node *ptr;
ptr=(node *) malloc(sizeof(node));
ptr->info= item;
if( *head == NULL)...