July 5, 2013
Many programming languages provide a library function that calculates a serial number for each day, making it easy to calculate the number of days between two dates; we provide such a function in the Standard Prelude. Sometimes, though, the need is to calculate weekdays rather than total days.
Your task is to write a program that calculates the number of weekdays between two dates. When you are finished, you are welcome to read or run a suggested solution, or to post your own solution or discuss the exercise in the comments below.