Negative value to Positive value

Hi Experts,

We are facing an issue with negative value.

Ex: i want to calculate days between two days like

    Duedate : 25-12-2016 & current Date : 06- 01-2016

   am used days between function like : daysbetween([currentdate];[duedate])  now output coming like -354 days.

   Now i want positive values like 354 days..is their any function to calculate between two days get positive value?

   Finally my issue is  we need  354 instead of -354

   Anyone give me any suggestions how to resolve this issue.

  Thanking you Advance.

Regards,

G