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VALS
Andrew Owen edited this page May 30, 2023
·
1 revision
repr = VAL$(string)
Evaluates a string
as a string expression. For example
10 INPUT a$, x$
20 PRINT VAL$ a$
The string value assigned to a$
should be an expression using x$
. For example,
"x$+x$"
. A string value is then assigned to x$
, for example "yo"
. VAL$
strips
the quotes of the value of a$
to get x$+x$
and evaluates it using the value
assigned to x$
displaying the result yoyo
.
- This function is not present in Microsoft BASIC. It is very useful for
creating recursive functions, if used together with
AND
applied to string arguments, allowing for selective evaluation. - Expressions between curly braces
{
and}
are not evaluated, but their syntax is checked upon entering. They are interpreted as strings that can be passed to VAL$ for actual evaluation.
- Press
RETURN
to return to this menu. - Enter the name of a
TOPIC
to display it. - Enter
EXIT
to return to BASIC.
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