Negative values in Date Difference Calculation

hi,

i am trying to calculate the date difference between two dates

in my Scenario Start Date > End Date,

i am  using the function as DaysBetween(startdate;enddate) , but it return the negative values in the result,

how to show from negative values to positive values in the date difference output,

i want to use the results in the input control also using the positive values

Any inputs/guidance on this issue

Regards,

Balaji