A mandatory action is something that is required, obligatory, or compulsory. Like letting your Great Aunt Edna pinch your cheeks or passing gym to get your diploma. Mandatory is often used in opposition to optional.

When something is required mandatory or obligatory?

As adjectives the difference between obligatory and mandatory. is that obligatory is imposing obligation, morally or legally; binding while mandatory is obligatory; required or commanded by authority.

Whats the meaning of of obligatory?

1 : binding in law or conscience The ordinance made it obligatory that homeowners clear the snow from the sidewalks. 2 : relating to or enforcing an obligation a writ obligatory.