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GOSUB Statement
Category Reference/Commodore BASIC V3.5 Topic GOSUB line# AKA GO to SUBroutine. This is similar to the GOTO statement, but remembers where it was executed from. When a RETURN statement is encountered, the program resumes execution following the last encountered GOSUB statement. This is normally used for accessing sections of a program (subroutine) that are kept isolated from the main program. Multiple GOSUBs may be executed concurrently. A RETURN statement returns to the last executed GOSUB statement, therefore multiple RETURN statements will be required to end all GOSUB statements. If a RETURN statement is encountered and there is no GOSUB in operation, a ?RETURN WITHOUT GOSUB ERROR will occur. If a line number is not specified after a GOSUB statement, it assumes line 0. If the specified line number does not exist in the program, an ?UNDEF'D STATEMENT ERROR occurs. Examples `20 GOSUB 300` Goes to line 300 and executes the program from there `: :` `300 PRINT "HELLO" : RETURN` The RETURN statement returns program execution to the point immediately following the GOSUB statement Abbreviation GO SHIFT+S