isnan

  • Article

Determines if the specified value is NAN or QNAN.

ret isnan(x)

Parameters

Item Description
x
 [in] The specified value.

Return Value

Returns a value of the same size as the input, with a value set to True if the x parameter is NAN or QNAN. Otherwise, False.

Type Description

Name Template Type Component Type Size
x scalar, vector, or matrix float any
ret scalar, vector, or matrix bool as input

Minimum Shader Model

This function is supported in the following shader models.

Shader Model Supported
Shader Model 2 (DirectX HLSL) and higher shader models yes
Shader Model 1 (DirectX HLSL) yes (vs_1_1 only)

Requirements

Requirement Value
Header
Corecrt_math.h

See also

Intrinsic Functions (DirectX HLSL)