Microsoft USD - $Return does not store any value

Dear all,

I am trying to store a value through JavaScript inside $return because i want to use it later but it is not working.

I have created an ActionCall with RunScript as Action and below Script,

function abc()
{
var abc=true;
return abc;
}

abc();

And when i run this from debugger and refresh my data parameters there is no variable.

But there should be abc=true

Please help.

Thanks