The _cardinality_ of a [set](Sets.md) is the number of elements in that set. Such a set may have an [infinite](Infinite%20set) or [finite](Finite%20sets.md) cardinality. An infinite set may also be [countably infinite](countably%20infinite%20set) or [uncountably infinite.](uncountably%20infinite%20set) ^304fc5 # Finite set cardinality [Finite sets](Finite%20sets.md) #MathematicalFoundations/SetTheory #MathematicalFoundations/Numbers