# outp

char outp(int portNumber, char byteToWrite);

## Purpose

Writes a byte to a port.

| Note outp 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 to which the byte is written.
byteToWrite | char | Byte to write.

## Return Value

Name | Type | Description
byteWritten | char | Byte written to the port.