How to access parameters in a Parameterized Build?

Question

How do you access parameters set in the "This build is parameterized" section of a "Workflow" Jenkins job?

TEST CASE

1. Create a WORKFLOW job.
2. Enable "This build is parameterized".
3. Add a STRING PARAMETER foo with default value bar text.

4. Add the code below to Workflow Script:

   node()
   {
        print "DEBUG: parameter foo = ${env.foo}"
   }
   

5. Run job.

RESULT

DEBUG: parameter foo = null

Answer 1

I think the variable is available directly, rather than through env, when using Workflow plugin. Try:

node()
{
    print "DEBUG: parameter foo = ${foo}"
}