Commodore VIC-20 - GOTO; IF-THEN

Appendix G: BASIC Statements 349
Subroutine branches back here
2000 Subroutine entry point
2098 RETURN
Branch back to line 110
GOTO
The GOTO statement branches unconditionally to a specified line.
Format:
GOTOln
Example:
19 GOTO 10e
Executed in immediate mode, GOTO branches to the specified line in
the stored program without clearing the current variable values. GOTO
cannot reference immediate mode statements, since they do not have line
numbers.
IF·THEN
The IF-THEN statement provides conditional execution of statements
based on a relational expression.
Format:
IF condition THEN statement[:statement ... ] Conditionally execute statement(s)
IF condition {THEN} line Conditionally branch
GOTO
If the specified condition is true, then the statement or statements
following the
THEN are executed. If the specified condition is false, control
passes to the statement(s) on the next line and the statement
or statements
following the THEN are not executed.
For a conditional branch, the branch
line number
is placed after the word THEN or after the word GOTO. The
compound form THEN GOTO is also acceptable.
IF A = I THEN 50 }
IF A = 1 GOTO 50 Equivalent
IF A = I THEN GOTO 50