Power Automate Functions - EMPTY Function

EMPTY Function

What is an EMPTY function?

EMPTY function return true or false on the behalf of variable values. If the variable keeps no values in it empty function returns true. If initialized variable keeps a value in it, empty function will return false. It is used for all cases like ARRAYS, STRING, AND OBJECTS

Description:

In this guide, we will discuss how to use the float function in power automation. Let us create a new flow. To create a new flow follow the following instructions:

Go to power Apps:

Navigate to Flows:

Click on the ‘New Flow’ button:

After clicking new flow, select ‘Instant Cloud flow’ form the dropdown:

Finally set its name and select ‘manually’ as flow trigger point:

In the below screenshot we set the Name of flow and its trigger point which is ‘Manually trigger a flow’. Finally click on the create button to create a new flow. 

First, add INITIALIZE VARIABLE ACTION:

To initialize a variable select initialize variable action from the actions set. Then set its properties the same as mentioned in the screenshot.

1# INITIALIZE VARIABLE ACTION

INITIALIZE VARIABLE:

Initialize a variable having the following attributes. 

Name: set variable name

Type: set the type of variable as ‘array’

Value: set values as

2# ADD ‘COMPOSE ACTION’ TO CALL EMPTY FUNCTION

CODE:

Empty (variables ('EMPTY FUNCTION FOR STRING'))

If you already assign values to variable EMPTY FUNCTION, return ‘FALSE’. Empty function check the variable if there is any value assigned to variable it will return false

OUTPUT:

So we can see empty function returns us a false because there an any value stored in the variable it’s not empty

2# INITIALIZE VARIABLE ACTION

INITIALIZE VARIABLE:

Initialize a variable having the following attributes. 

Name: set variable name

Type: set the type of variable as ‘STRING’

Value: “Walter”

ADD ‘COMPOSE ACTION’ TO CALL EMPTY FUNCTION

CODE:

empty(variables('EMPTY FUNCTION FOR STRING'))

If you already assign values to variable EMPTY FUNCTION return ‘FALSE’. Empty function check the variable if there is any value assigned to a variable it will return false

OUTPUT:

So we can see empty function returns us a false because there an any value stored in the variable it’s not empty

3# INITIALIZE VARIABLE ACTION

INITIALIZE VARIABLE:

Initialize a variable having the following attributes. 

Name: set variable name

Type: set the type of variable as ‘STRING’

Value: empty (null)

Do not assign any value to this variable leave it empty. You can see in the image there is no value assigned to that variable

ADD COMPOSE ACTION:

Call empty function in this to compose function. This will check whether you assign any value to a given variable or not. If you assign it will return false and if you leave the value checkbox empty it will return true. Means you variable is really empty

CODE:

empty(variables('NONE VALUE VARIABLE'))