System
Closes all open files and ends the program
System( [ retval ] )
retval
Closes all open files, exits the program, and returns to the operating system. An optional return value, an integer, can be specified to return an error code to the system. If no return value is given, a value of 0 is automatically returned. This is the same as End and is here for compatibility between older BASIC dialects. It is recommended to use End instead.
Usage of this statement does not cleanly close scope. Local variables will not have their destructors called automatically, because FreeBASIC does not do stack unwinding. Only the destructors of global variables will be called in this case.
For this reason, it is discouraged to use System simply to mark the end of a program; the program will come to an end automatically, and in a cleaner fashion, when the last line of module-level code has executed.
Syntax
Usage
System( [ retval ] )
Parameters
retval
Error code returned to system.
Description
Closes all open files, exits the program, and returns to the operating system. An optional return value, an integer, can be specified to return an error code to the system. If no return value is given, a value of 0 is automatically returned. This is the same as End and is here for compatibility between older BASIC dialects. It is recommended to use End instead.
Usage of this statement does not cleanly close scope. Local variables will not have their destructors called automatically, because FreeBASIC does not do stack unwinding. Only the destructors of global variables will be called in this case.
For this reason, it is discouraged to use System simply to mark the end of a program; the program will come to an end automatically, and in a cleaner fashion, when the last line of module-level code has executed.
Example
Print "this text is shown"
System
Print "this text will never be shown"
System
Print "this text will never be shown"
Differences from QB
- None
See also