Articles play an important role in Latvian grammar as they help to determine the definiteness or indefiniteness of a noun. In Latvian, definite and indefinite articles are used to indicate whether the noun is known or unknown to the listener.

The definite article in Latvian is “the” and it has two forms: “the” for masculine and feminine nouns, and “to” for neuter nouns. It is placed in front of the noun and agrees with the gender and case of the noun.

The indefinite article in Latvian is “a” or “an” and it also has two forms: “viens” for masculine nouns and “viens” or “viens” for feminine and neuter nouns. It is used to refer to a non-specific or unknown noun.

However, it is important to note that the use of articles in Latvian is not as common as in some other languages, such as English. In many cases, the definiteness or indefiniteness of a noun is determined by other grammatical features, such as word order or context.