From QB64 Wiki
The STOP statement is used to stop program execution when troubleshooting a program or to suspend event trapping.
- STOP used in the Qbasic IDE does not close any files or go to the operating system. It returns to the IDE.
- In the QB64 compiler, STOP closes the program window and returns to the IDE when the code is compiled from there.
- STOP is ONLY used for debugging purposes and should not be used to exit programs!
- STOP can also be used to suspend an event trap in the following statements: KEY(n), COM(n), PEN, PLAY, STRIG(n), TIMER, UEVENT. The trap can be turned back on with ON and returns any trap events since STOP was used.
Example: When run in the Qbasic IDE, the program will return to the IDE at STOP. Press F5 to finish the program.
- Explanation: QB64 will STOP the program and close the window as it does not have an interpreter to run the rest of the code.