Parameter in tableau

      All the values in the calculated field are static if you want make use of the dynamic values
        in place of static values we have to make use of a parameter .parameter will replace static value
        in the calculations, filters extra.in tableau we can create a different  types of parameters like
       string,integer,Boolean,date, extra  to the parameter based on the datatype we can add the values          manually we can add the values from field and even we can add from clipboard also.


  note:

     At a time the parameter we can select only single value multi values selection is not available.