VAL - source-solutions/HELP GitHub Wiki

value = VAL(string)

Returns the numeric value of the string expression string. See the section on numeric literals for the recognised number formats.

• Spaces before a number are ignored: VAL(" 10") returns 10. But unlike Microsoft BASIC, spaces inside a number are not ignored.
• Unlike Microsoft BASIC, expressions inside the string expression are also evaluated. For example, VAL "5+5" returns 10 and VAL "foo" returns the value of variable foo.
• 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.

string has a number value: Type mismatch.