Implementation of singly linked list using C

struct node

{
   int data;
   struct node *next;
};

struct node *insert(struct node *,int );
void display(struct node *);

struct node * insert(struct node *head ,int c)
{
   struct node *temp;
   temp=(struct node *)malloc(sizeof(struct node));
   temp->data = c;
   if(head == NULL)
   {
head = temp;
head->next = NULL;
   }
   else
   {
temp->next  = head;
head = temp;
   }
return head;
}

void display(struct node *head )
{
struct node *temp;
temp=head;
while(temp != NULL)
{
 
  printf("%d\n",temp->data);
  temp=temp->next;
}

}