====== StrIsNumber ======

This function show if string can be converted to number.

<code pcmi>
StrIsNumber(string)
</code>
|< 100% 15% >|
|**string**|Source string.|

Function return True, if **string** can be converted to number, False in opposite case.

Function return True, if *string** is string appearance of floating pont number, integer, or hexadecimal number written as '$FFAA00'.