Question

Gregor, a software developer, is developing a calendar application. He has to use several if conditional statements to ensure that the calendar displays the exact number of days present in each month of each year. He creates a dayCount array to keep track of the number of days in each month.

Gregor wants to create a condition to ensure that all the years divisible by 4 should contain 29 days in February. Which of the following statements should he use?
A) if (year % 4 === 0 && month === 2) { days = 29; }
B) if (year % 4 === 0 || month === 2) { days = 29; }
C) if (year % 4 === 0) { days = 29; }
D) if (month === 2) { days = 29; }

Answer 1

To ensure February has 29 days during leap years, Gregor should use the statement if (year % 4 === 0 && month === 2) { days = 29; }. This covers the condition for most leap years, but for full accuracy regarding the Gregorian calendar, additional rules should be implemented.

Step-by-step explanation:

Gregor, a software developer, is developing a calendar application and needs to accurately represent the number of days in February for leap years. To ensure that February has 29 days in a year divisible by 4 Gregor should use the conditional statement: if (year % 4 === 0 && month === 2) { days = 29; }. This condition checks that the year is divisible by 4 and that the month is February (typically represented by "2" in programming for the second month of the year) setting the days to 29 accordingly.

It's important to note that this rule covers most cases, but for complete accuracy reflecting the current Gregorian calendar which is the calendar most of the world uses today, Gregor would have to account for additional rules. Specifically while most years divisible by 4 are leap years, a year that is divisible by 100 is not a leap year unless it is also divisible by 400. Therefore to fully emulate the Gregorian calendar, Gregor would have to refine his code further.