# inp

inp (int portNumber);

## Purpose

Reads a byte from a port.

| Note inp requires the LabWindows/CVI low-level support driver. LabWindows/CVI loads the driver at startup if it is on disk. You can check whether LabWindows/CVI loaded the driver at startup by calling CVILowLevelSupportDriverLoaded.

## Parameters

Input
Name | Type | Description
portNumber | integer | Port from which to read the byte.

## Return Value

Name | Type | Description
byteRead | char | Byte read from the port.