Number of days between two dates excluding weekends

Hi Experts,

I need to calculate number of days(which excludes weekends) between two dates.

Example:

date1: 10/15/2015;

date2: 11/03/2015;

Result = date1 - date2;

Result = 19 days; (with weekends)

Result should be 13 days excluding weekends.

Can you please help me, how to implement excluding weekends.

Thanks & Regards,

Balamurugan G