Scheduled Job

[atishaytoma]

 if (reminderTime == '15 minutes') {

            reminderDateTime.addMinutes(-15);

        } else if (reminderTime == '30 minutes') {

            reminderDateTime.addMinutes(-30);

        } else if (reminderTime == '1 hour') {

            reminderDateTime.addMinutes(-60);

        }

       
how is this block of code exactly working.