What is the difference between stateful autoconfiguration and stateless autoconfiguration for IPv6?

What will be an ideal response?

Stateful autoconfiguration means that the computer or network device using IPv6 contacts a DHCP server for a leased address. In stateless autoconfiguration, the computer or network device assigns its own IPv6 address, which is constructed from the MAC address of its NIC combined with the subnet designation obtained from communication with a router. Stateless autoconfiguration of an IPv6 address does not require a DHCP server but is included in the DHCPv6 standard for compliance with IPv6 capabilities.