The control-chars command enables or disables the entering of control characters at input, depending on the option specified.
Under default conditions, nonediting control characters are accepted by standard input commands. By doing control-chars (f, these characters are ignored.
The settings of this option are sent up and down levels for the current port.
The control-chars setting may be temporarily overwritten in a BASIC program with the inputctrl statement.
control-chars {(options}
| options | f | Disables control character input. |
| n | Enables control character input. This is the default. | |
| s | Suppresses output of status message. |