Sanskrit is a highly inflected language with three grammatical genders (masculine, feminine, neuter) and three numbers (singular, plural, dual). It has eight cases: nominative, vocative, accusative, instrumental, dative, ablative, genitive, and locative. Nouns are grouped into "declensions", which are sets of nouns that form their cases in a similar manner. In this article they are divided into five declensions. The declension to which a noun belongs is determined largely by form.