Tell how to check whether a linked list is circular

Tell how to check whether a linked list is circular?

Answer:

Create two pointers, each set to the start of the list. Update each as follows:

while (pointer1)

{

pointer1 = pointer1->next;

pointer2 = pointer2->next;

if (pointer2) pointer2=pointer2->next;

if (pointer1 == pointer2)

{

print (\"circular\n\");

}

}