The niladic system function ŒC returns a vector of the 32 ASCII control characters and rubout. It is mainly useful for sending escape sequences to dumb terminals or other low-level devices. For example, with ŒIO (index origin) set to 1 (the default).
ŒC[1] is NUL ŒC[8] is BELL ŒC[9] is BACKSPACE ŒC[10] is TAB ŒC[11] is LINE FEED ŒC[13] is FORM FEED ŒC[14] is CARRIAGE RETURN ŒC[28] is ESC ŒC[33] is RUBOUT
Note that some of these character positions have been assigned to line-drawing characters in some versions of APLX.
See also ŒTC.