uid	title	ms.date	ms.topic	qsharp.kind	qsharp.namespace	qsharp.name	qsharp.summary
Microsoft.Quantum.Diagnostics.FiniteFact	FiniteFact function	7/28/2023 12:00:00 AM	managed-reference	function	Microsoft.Quantum.Diagnostics	FiniteFact	Checks whether a given floating-point value represents a finite number, and throws an exception if this is not the case.

FiniteFact function

Warning

This documentation refers to the Classic QDK, which has been replaced by the Modern QDK.

Please see https://aka.ms/qdk.api for the API documentation for the Modern QDK.

Namespace: Microsoft.Quantum.Diagnostics

Checks whether a given floating-point value represents a finite number, and throws an exception if this is not the case.

function FiniteFact (d : Double, message : String) : Unit

Input

The floating-point value that is to be checked.

Failure message to be used as an error message if d is either not finite, or not a number.

The following Q# code will throw an exception:

FiniteFact(NaN(), "NaN is not a finite number.");