Click on the button New.

Enter the variable name NENN under Name.

Under Storage location [Save location], select the option Only in table or In geometry and table.

(No feature algorithm can be used for the "Only in geometry [Only in geometry] " storage location [Save location] )

Under Status, select the Feature algorithm [Attribute algorithm] option.

Under Formula [Equation], open the extended input field by clicking on ... to open the extended input field.

Click on the $VAR= button.

-> The variable name entered under Name is written into the field as the first expression component of the feature algorithm .

Specify the assignment that is to define the NENN variable [Variable].

-> Since NENN is a text variable, the expression NENN = '$H.x$B.x$L.'.

"Feature algorithm [Attribute algorithm] " dialog box

Note The use of correct syntax is very important: Text variables For text variables, always enter the information within the two single quotation marks. In the format dollar sign Variablenname dot [Point] , variables can be included in the algorithm as placeholders. Combinations with other characters or arithmetic symbols and links via IF and ELSEIF functions (see explanation below) are also possible. Number variables In the case of numeric variables no apostrophes are required. A numeric variable can be assigned a fixed numerical value and/or a calculation which, in turn, contains variables.

Close the dialog by clicking OK.

-> The entry is set under Formula [Equation].

Finally, click on Add variable.

-> The variable NENN is added to the list of all project variables.

-> The variable NENN is marked with the corresponding icon for feature algorithm [Attribute algorithm].