Answer:
In Java
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
int mnth, yr;
Scanner input = new Scanner(System.in);
System.out.print("Month: "); mnth = input.nextInt();
System.out.print("Year: "); yr = input.nextInt();
boolean lpYear = (yr % 4 == 0 && yr % 100 != 0) || (yr % 400 == 0);
if(mnth == 1 || mnth == 3 || mnth == 5 || mnth== 7 || mnth == 8 || mnth == 10 || mnth == 12){
System.out.print("31 days"); }
else if(mnth == 2){
System.out.print(((lpYear) ? "29 days" : "28 days")); }
else if(mnth == 9 || mnth == 6 || mnth == 4 || mnth== 11){
System.out.print("30 days"); }
else{ System.out.print("Invalid"); }
}
}
Explanation:
See attachment for complete program where comments were used as explanation.
