ISTEXT
Applies to: 
Calculated column
Calculated table
Measure
Visual calculation
Checks if a value is text, and returns TRUE or FALSE.
Syntax
ISTEXT(<value>)
Parameters
| Term | Definition |
|---|---|
| value | The value you want to check. |
Return value
TRUE if the value is text; otherwise FALSE.
Remarks
This function is not supported for use in DirectQuery mode when used in calculated columns or row-level security (RLS) rules.
Example
The following examples show the behavior of the ISTEXT function.
//RETURNS: Is Text
= IF(ISTEXT("text"), "Is Text", "Is Non-Text")
//RETURNS: Is Text
= IF(ISTEXT(""), "Is Text", "Is Non-Text")
//RETURNS: Is Non-Text
= IF(ISTEXT(1), "Is Text", "Is Non-Text")
//RETURNS: Is Non-Text
= IF(ISTEXT(BLANK()), "Is Text", "Is Non-Text")