# System Variables

CHN | Channels Open

Numeric System Variable

## Contents

Numeric string, current open channels

## Description

The CHN variable contains a listing of all currently open channels. The value returned is a string of numeric two-byte values. The CHN variable indicates channel values below 65000.

## Example

To obtain the Hex values, use the HTA( ) function.

> ?hta(chn)
> 0000001E

In this example, dec($0000$)=0 (i.e. the console) and dec($001E$)=30 (the open file's channel).