Now don't run ?

[ggauny@live.fr]

Hi,
An old program from Mic Nick now don't run. I don't know why, may be help ?

Thanks.

[Tim Wessman]

Hello,

The reason is because when INPUT(f,"...") is run, the expression you type is EVALUATED. If X=2, and you type X^2-1, on exit the INPUT form evaluates and you get 2^2-1, or 3 as your value for f.

You can either put your expression inside ' ' using the two keys [SHIFT][ ( ) ], or put in " " around your expression.

'X^2-1' or "X^2-1" will both work.

You can modify the program to be like this to avoid needing to do ' ' or " ".

INPUT({{f,[2]}}, ....);

[ggauny@live.fr]

Hi Tim,
Very many thank you. It run now.

Good day.

[leprechaun]

Cool.
Could someone elaborate a bit on the reason that the proposed sollution works? Would be really helpful. I am confused because of the double list and the vector [2] which I cannot explain.

edit: well some thinking and a fresh cup of coffee made me realize that [2] is the allowed type String. Is it right that in this case the entry is converted to an unevaluated string because you specified that the allowed type is string?

[Tim Wessman]

Exactly, specifiying string means it will not evaluate anything. Storing into F1:="<string>" is a special case and will convert to an expression.