math question: negative numbers

[naxo]

Hi, ok I get it, its seems that "-" is too a string (i was not too sure on that)
I was thinking in using tostring but I was wondering how do I get that. Thanks!

[Cybergraph]

Hi;

How can I know if I write from input is a negative number?

First, at level of string, checking if the left most character is a "-" (minus), using String.Left function.

Second, you could convert the string to a number, and check if it is < 0.

[naxo]

Hi;

How can I know if I write from input is a negative number?