the difference between psql , createdb, dropuser

Setve <[email protected]> Sun, 27 Oct 2019 20:23:01 +0000
Newsgroups gmane.comp.db.postgresql.admin
Message-ID <REvXVFO-CndBi7DSjs8pIFGJXbS3oHuqroWUa4-AVBck7ltG60T2hKfzjMUzQODLePOuqB1GV6CPSYeI_YJtrg8mJDE7cJaNzcFTnvlDogw=@protonmail.com>
[I can execute the create user or create db .etc... command at a PostgreSQL interactive terminal so why are these commands "createuser , createdb , dropdb etc.... separately and what is their purpose?](https://www.reddit.com/r/PostgreSQL/comments/dnyr0n/i_can_execute_the_create_user_or_create_db_etc/)