Terminates program execution.
END statements can be used in a single program. Program 
execution is terminated and open files are closed automatically at the end of 
the program even if an END statement is not included.10 FOR I = 1 TO 20
20 IF I > 10 THEN END
30 PRINT I;
40 NEXT I
Displays values of I in FOR ~ NEXT loop.
Program ends when I exceeds 10.