T
This function returns the target text, or a blank text string if the target is not text.
If an error occurs the function returns the error value.
T(value)
If \<emph\>value\</emph\> is a text string or refers to a text string, T returns that text string; otherwise it returns a blank text string.
T(12345) returns an empty string "".
T("12345") returns the string 12345.
