How to calculate the number of working hours between two dates?

Question

Algorithms

Interested in the algorithm for calculating working hours between dates

Answer 1

You could at least clarify the input data.
Suppose there are 8 working hours in a day.
We take the difference between the dates and multiply by 8 hours. For example:
D1: 06/13/2015
D2: 06/24/2015
Work. hours: (06/24/2015 - 06/13/2015) * 8 = 11 * 8 = 88 hours.
But here we must also take into account weekends, i.e. do not stupidly subtract a smaller date from a large date, but iteratively look at each date, if it is a day off, then skip, if it is a worker, then increment the number of days.