---
title: "ISBLANK"
description: "ISBLANK"
keywords: "ISBLANK"
url: "https://myrapidi.com/wiki/isblank"
locale: "en"
published: "2015-07-27T16:21:35Z"
modified: "2015-09-21T15:44:27Z"
---

# IsBlank(expr)

The IsBlank(expression) function takes a field or an expression and return 1 (or true) if that field is blank or null or if the expression evaluates to a blank or null value.

** **

**Example:**

IsBlank("Fax No.")    ---\>   1 (true) if the field "Fax No." is blank or null, otherwise 0 (false)

IsBlank(DBLookup('DESTDS','User','Alias',"Salesperson",'Id'))   ---\> 1 (true) if the DBLookup function does not find a User for this Salesperson, otherwise 0 (false)

 

The formula  
**##IF(EQUALS(TAXGROUP,''),0,1)** 

can now be written like

**##IF(ISBLANK(TAXGROUP),0,1) ** or even shorter like **##1-ISBLANK(TAXGROUP)**