constant
adj//ˈkɑnstənt//konstant
Unchanged through time or space; permanent.
Consistently recurring over time; persistent.
Steady in purpose, action, feeling, etc.
That which is permanent or invariable.
(algebra) A quantity that remains at a fixed value throughout a given discussion or operation.
(science) Any property of an experiment, determined numerically, that does not change under given circumstances.
(computing) An identifier that is bound to an invariant value; a fixed value given a name to aid in readability of source code.