How can I exit Microsoft GW-BASIC, IBM BASICA, or other similar old dialects of BASIC?

Question

Microsoft BASIC, GW-BASIC and BASICA all use a prompt that looks like this:

I can\'t figure out how to exit any of these. Typing END does not e

Answer 1

GWBASIC and its clones (e.g., IBM's BASIC and BASICA) exited to the DOS prompt with the command system.

Although redirection was possible even in early versions of MS-DOS/PC-DOS, the BASIC interpreter bypassed using the standard input and output streams, and had its own Ctrl-Break/Ctrl-C handler, so neither of those keystrokes would terminate the interpreter.
The shell command started a fresh copy of the system command interpreter (usually COMMAND.COM), or executed a system command and then returned to BASIC, but did not remove the interpreter from memory.