Can you please elaborate regarding your query?
Yes, Net salary will vary and there are many conditions for it such as LOP, any advances from company etc.
It will be better if you be precise regarding your query so that the members of this forum can guide you accordingly.
Does your query like this if in any month whether it is 30 days month or 31 days month or like Feb month 28 days are there. in a such scenario salary would be the same or differ ?
For monthly paid employee salary would be the same if the month days vary like 30,31 or Feb month like 28 days.
Hope so it will clear your concern.
Net salary is bound to change depending on LWP or other unpaid leaves which attracts deductions from the salary, but it does not change depending to number of days in a month.