1. Give a description for your expression
2. Specify a name for the Stored Value that will hold the result
3. Select the 'Type' (these are detailed below)

1. Addition - adds two values together.
2. Subtraction - subtracts one value from another.
3. Date Adjustment - allows you to add or subtract a number of units to a date in a stored value and store the output in a different stored value.
4. Series - enables different data item to be retrieved each time a Workflow member passes through the stage, based on a numeric value stored in an stored value.
5. Advanced - executes an ECMA 5.1 (JavaScript) script allowing for numeric, date and string operations to be performed for advanced data manipulation.
6. After your selection is made, click on the second tab.

1. Enter the first number for your calculation
2. Enter the second number for your calculation

Date Adjustment allows you to add or subtract a number of units to a date field and store the output in a Stored value. 
This could be based on the current date at the time a member enters the stage or the date held in a Stored Value.

1. To perform an adjustment to the current date, select this check box OR
2. If performing an adjustment to a Stored Value date, select the name of the Stored Value from the list.
3. Select the 'Adjustments' tab.

In this tab you choose the adjustment to apply to each of the date units.
If applying a negative adjustment you should include the minus symbol. Otherwise use a positive number without (+).

The example above will minus 3 months from the date it is querying so if the date it was looking at was 07/06/2018, then the result will be 07/03/2018.

A Series expression allows you to use a member stored value as a starting point, and to change that value each time a member passes through the stage.
This can be used to progress people through sections of a Workflow by updating the value once they've completed particular sections.
The item number could also relate to a campaign ID which in turn can be used to trigger particular campaigns to members. This is an advanced feature.

1. Select the Stored Value from the index list.
2. Set a default value to be used if the current value for the member doesn't match any value you intend to use within this stage.
3. Use the add button to add a row, one at a time.
4. Type the value that the Stored Value should change to on each occasion the member passes through the stage.

Advanced executes an ECMA 5.1 (JavaScript) script allowing for numeric, date and string operations to be performed for advanced data manipulation.

This can be used for many things including:

• concatenating contact fields together
• setting strings to lower case
• performing arithmetic

1. Type your code into the input area.

Both functions and single expressions are supported e.g.

//function version

function execute(){

var firstName = '[@contact->firstName]';

return firstName.toLowerCase();

}

//single expression version (return not required)

'[@contact->firstName]' + ' ' + '[@contact->lastName]'