How to tell number?

[sifuhall 0]

I would like to return true if number and false if not.

 

For example:

 

1 would return true

a would return false

 

How can I do this?

[UBotDev 276]

You can try with regular expression:

\d+

and check the length of returned string.

 

If lenght > 0 then you have a number, else you don't.

[sifuhall 0]

Thank you

[danoctav 7]

ui text box("Enter data:", #var)
set(#var, $find regular expression(#var, "[-+]?\\b[0-9]+(\\.[0-9]+)?\\b"), "Global")
if($comparison(#var, "!=", $nothing)) {
    then {
        set(#isnumber, "true", "Global")
    }
    else {
        set(#isnumber, "false", "Global")
    }
}
ui stat monitor("Number? ", #isnumber)

where regex is for an integer or a floating point number, positive or negative . For a simple integer (with sign .... positive or negative) :

^[-+]?\d+$