VALS - source-solutions/HELP GitHub Wiki

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.