+A cardinal number is a mathematical concept used to describe the "size" of a [Set](/wiki/set), independent of the nature of its elements. It extends the idea of counting to both finite and [Infinite Set](/wiki/infinite_set)s, allowing us to compare their magnitudes.
+## See also
+- [Ordinal Number](/wiki/ordinal_number)
+- [Set Theory](/wiki/set_theory)
+- [Count](/wiki/count)
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