This is a BASICtools command that erases the screen and the buffer in PC memory. It is useful when you are typing in short programs a line at a time.
It does not affect the current BASIC program in ARM memory, to erase that program, you can hit or type clear, and then RUN a short program like
That will replace the program in ARM memory with a short do nothing program.
It should NOT be used as a statement inside a BASIC program.