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DigitalDreams
Regular Member

Joined: 03/05/2025
Location: United Kingdom
Posts: 53

Posted: 05:41pm 07 Mar 2026

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Having trouble with this command.

If x$="57+93+117"

Val(x$) returns 57 !?

Am I asking too much of val(x$) ?

Martin H.

Guru

Joined: 04/06/2022
Location: Germany
Posts: 1400

Posted: 05:50pm 07 Mar 2026

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DigitalDreams said Having trouble with this command.

If x$="57+93+117"

Val(x$) returns 57 !?

Am I asking too much of val(x$) ?

yes

Quote Returns the numerical value of the ‘string$’. If 'string$' is an invalid number the function will return zero.
This function will recognise the &H prefix for a hexadecimal number, &O
for octal and &B for binary

So it converts the numerical value within a string into a number. But it does not calculate any formulas that are within the string.

'no comment

bfwolf
Senior Member

Joined: 03/01/2025
Location: Germany
Posts: 178

Posted: 05:58pm 07 Mar 2026

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DigitalDreams said Am I asking too much of val(x$) ?

Yes, you're asking too much of `VAL(s$)`. This function (as it exists in the BASIC dialect) simply tries to find a number within a string and returns the value after the first match. It doesn't evaluate any expressions!

Try `EVAL(s$)`, which is fortunately available in MMBasic!

Will evaluate 'string$' as if it is a BASIC expression and return the result.
'string$' can be a constant, a variable or a string expression. The expression can
use any operators, functions, variables, subroutines, etc that are known at the
time of execution. The returned value will be an integer, float or string
depending on the result of the evaluation.
For example: S$ = "COS(RAD(30)) * 100" : PRINT EVAL(S$)
Will display: 86.6025

DigitalDreams
Regular Member

Joined: 03/05/2025
Location: United Kingdom
Posts: 53

Posted: 06:25pm 07 Mar 2026

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bfwolf said

DigitalDreams said Am I asking too much of val(x$) ?

Thanks !, that's the ticket. I'm about to print a truncated version of the latest user manual so none to hand...

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