NAME
  INKEY$ Function

SYNOPSIS
  INKEY$
      o INKEY$ returns a null string if there is no character to return.
      o For standard keys, INKEY$ returns a 1-byte string containing the
        character read.
      o For extended keys, INKEY$ returns a 2-byte string made up of the null
        character (ASCII 0) and the keyboard scan code.

DESCRIPTION
  Reads a character from the keyboard.

  Example:
      PRINT "Press Esc to exit..."
      DO
      LOOP UNTIL INKEY$ = CHR$(27)    '27 is the ASCII code for Esc.

SEE ALSO
  Keyboard Scan Codes