Talk:Determine if a string is numeric: Difference between revisions

:::msgbox isnumeric(" &HFF ")

 

 

:: I hadn't realized that there was an ambiguity. I hadn't even realized that "isnumeric" is a VB function (I certainly don'ty know VB). In the two examples I contributed (IDL and TCL) I assumed that the task meant that something would be interpreted as a number if handed to the language in question. I.e. if I can multiply it with two or take the sin() of it then it is numeric. For example in IDL I might say "sin(double(x))" where "double(x)" converts the input into a "double" (8-byte float) which will fail if "x" is, for example, the string "foo". I trap the error and decide what is or isn't "numeric" based on the occurrence of this kind of error. This will allow "1.1" or "-.1e-04" or "+000003" etc.