Script format for defining Workflow parameter value

Question

Hopefully a basic question but can't find an answer; When using a script to set the value of a Parameter in the Workflow options and start conditions, how is the script defined? I've tried using the below, but the Parameter value is empty, I cant find an example of setting the value in the SDK: 
 
 function onInit($context){ 
 $workflow.Parameter("TestParam")="Test Value" 
 }

Richard.Lambert · Accepted Answer

Scripts created to return values to workflow parameters can simply be given a name and the name of the function in this case probably shouldn't be the built-in function name of OnInit. Save the script and then within the workflow parameter's settings, you can select the script and the function name. 
 Reworking your script example, it could be something like this 
 function TestValue ($Request) { 
 Return "Test Value" 
 }

JohnnyQuest · Answer

To expand on what Richard.Lambert said, when defining your Parameter for your workflow in the workflow configuration itself, you have the option for its value to be obtained from a script. A clearer example might be as follows: Function ProvideMyParameterValue ($Request) { 
 return "Some Data for My Parameter" 
 } So, when you define the source for the Parameter, you would reference the script and within the script, the function ProvideMyParameterValue. The data that would come back (in this case) is the hard coded string Some Data for My Parameter. Of course, you could just as easily substitute a variable there - i.e. $MyVariable which the code in the script would populate.

Script format for defining Workflow parameter value

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