// Write a program that reads an integer value from the user representing
// a year. The purpose of the program is to determine if
// the year is a leap year (and therefore has 29 days in February)
// in the Gregorian calendar. A year is a leap year if it is divisible
// by 4, unless it is also divisible by 100 but not 400. For example,
// the year 2003 is not a leap year, but 2004 is. The year 1900 is
// not a leap year because it is divisible by 100, but the year 2000
// is a leap year because even though it is divisible by 100, it is also
// divisible by 400. Produce an error message for any input value
// less than 1582 (the year the Gregorian calendar was adopted). In your response, include at most 2 words that are fully capitalized to emphasize key points.
user