Commodore VIC-20 - Page 38

GOTO or GO TO
Format: Abbreviation: Screen Display:
GOTO line number GH![T~i|o G |~~
This simple statement allows the BASIC program to execute
lines out of numerical order. The word GOTO followed by a number
will make the program jump to the line with that number. GOTO
cannot be followed by a variable, but must have the line number
typed after the word GOTO.
EXAMPLE 1:
10 GOTO 10
Notice that the loop in the example never ends, since the
program keeps running the same line over and over. This is called
an "infinite loop," and can be utilized when you want a program to
stop in place and wait. The only way to stop an infinite loop is with
EXAMPLE 2:
10 PRINT "HELLO";
20 GOTO 10
IF ... THEN
Format Choices: Abbreviation: Screen Display:
IF expression THEN line number None None
IF expression THEN statement
This is the statement that gives BASIC most of its 'Intelligence,11
the ability to evaluate conditions and take different actions
depending on the outcome.
The word IF is followed by an expression, which can include
variables, strings, numbers, comparisons, and logical operators.
The word THEN is followed on the same line by either a line number
or one or more BASIC statements. When the expression is false,
everything after the word THEN on that line is ignored* and
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