Blank, Coalesce, IsBlank, and IsEmpty functions in PowerApps • • 6 minutes to read • Contributors • • • • • In this article Tests whether a value is blank or a contains no, and provides a way to create blank values. Overview Blank is a placeholder for 'no value' or 'unknown value.' A control is blank if the user hasn't typed any characters in it.

The same control is no longer blank as soon as the user types a character in it. Some data sources can store and return NULL values, which are represented in PowerApps as blank.

Note At this time, storing blank values is supported only for local collections. We know that many data sources support blank (NULL) values, and we're working to lift this limitation. Any property or calculated value can be blank. For example, a Boolean value normally has one of two values: true or false. But in addition to these two, it can also be blank.

This is similar to Microsoft Excel, where a worksheet cell starts out as blank but can hold the values TRUE or FALSE, among others. At any time, the contents of the cell can be removed, and it would return to a blank state. Empty is specific to tables that contain no records. The table structure may be intact, complete with names, but no data is in the table. A table may start as empty, take on records and no longer be empty, and then have the records removed and again be empty. Description The Blank function returns a blank value. Use this to store a NULL value in a data source that supports these values, effectively removing any value from the field.

The IsBlank function tests for a blank value. Blank values are found in situations such as these: • The return value from the Blank function. • A control property has no formula set for it. • No value is typed into a text-input control, or no selection is made in a listbox. You can use IsBlank to provide feedback that a field is required.

Reference information, including syntax and examples, for the Blank, Coalesce, IsBlank, and IsEmpty functions in PowerApps. Table to test for records. Examples Blank. What is an air blank? An air blank is a method of checking a breath alcohol tester prior to performing a test to ensure the instrument is starting from zero. The device takes a reading of its alcohol sensor and sampling chamber to confirm that there is no alcohol remaining from any previous test.

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• A string that contains no characters has a of 0. • An error occurred in a function.

Often, one of the arguments to the function wasn't valid. Many functions return blank if the value of an argument is blank.

• Connected, such as SQL Server, may use 'null' values. These values appear as blank in PowerApps. • The else portion of an function wasn't specified, and all conditions were false. • You used the function but didn't specify a value for all columns. As a result, no values were placed in the columns that you didn't specify.