GOSUB label
or
CALL label
version 7.00-
[CALL] function/sub
Execution jumps to a subroutine marked by line label. Always use RETURN to exit a GOSUB, execution will continue on next statement after Gosub.
label may be defined as label: or as a SUB or FUNCTION
CALL added in version 6.25d
And in version 7.00 the CALL for a FUNCTION or SUB is optional. When CALLing a FUNCTION the return value is discarded.