Number of pairs of cranial nerves in human are:

Cranial nerves are nerves that directly arise from the brain.
Each pair of Cranial Nerve serves both sides of brain and body.
Cranial Nerve Pairs are representing in Romans i.e. I to XII.
Crania Nerves examples are Olfactory Nerves (relevant to smell), Optic Nerve (related to vision) and etc.