title	titleSuffix	description	author	ms.author	ms.reviewer	ms.service	ms.subservice	ms.topic	ms.devlang	ms.date	ms.custom
IS_NUMBER	Azure Cosmos DB for NoSQL	An Azure Cosmos DB for NoSQL system function that returns true if the type of the specified expression is a number.	jcodella	jacodel	sidandrews	cosmos-db	nosql	reference	nosql	02/27/2024	query-reference

IS_NUMBER (NoSQL query)

[!INCLUDENoSQL]

Returns a boolean value indicating if the type of the specified expression is a number.

Syntax

IS_NUMBER(<expr>)

	Description
`expr`	Any expression.

Returns a boolean expression.

The following example various values to see if they're a number.

:::code language="nosql" source="~/cosmos-db-nosql-query-samples/scripts/is-number/query.sql" highlight="2-9":::

:::code language="json" source="~/cosmos-db-nosql-query-samples/scripts/is-number/result.json":::