import java.util.Scanner;
 
public class LibraryFineCalculator {
    public static void main(String[] args) {
 
        Scanner sc = new Scanner(System.in);
 
        System.out.print("Enter number of days book is returned late: ");
        int daysLate = sc.nextInt();
 
        double fine = 0;
 
        // Fine calculation based on slabs
        if (daysLate <= 0) {
            fine = 0;
        } else if (daysLate <= 5) {
            fine = daysLate * 2;
        } else if (daysLate <= 10) {
            fine = (5 * 2) + ((daysLate - 5) * 5);
        } else {
            fine = (5 * 2) + (5 * 5) + ((daysLate - 10) * 10);
        }
 
        System.out.println("\nNumber of late days: " + daysLate);
        System.out.println("Library Fine: ₹" + fine);
 
        sc.close();
    }
}
 

Output

 
OUTPUT 1:
Enter number of days book is returned late: 3

Number of late days: 3
Library Fine: ₹6.0

Explanation: 3 days × ₹2/day = ₹6

OUTPUT 2:
Enter number of days book is returned late: 8

Number of late days: 8
Library Fine: ₹19.0

Explanation:

First 5 days → 5 × 2 = 10
Next 3 days → 3 × 5 = 15
Total = 10 + 15 = ₹25 (correct calculation: wait let’s recheck)

Check formula:

Days Late = 8
First 5 days → 5 × 2 = 10
Remaining days = 8 − 5 = 3
3 × 5 = 15
Total fine = 10 + 15 = 25 ✅

Update sample output:
Number of late days: 8
Library Fine: ₹25.0

OUTPUT 3:
Enter number of days book is returned late: 12

Number of late days: 12
Library Fine: ₹55.0

Explanation:

First 5 days → 5 × 2 = 10
Next 5 days → 5 × 5 = 25
Remaining 2 days → 2 × 10 = 20
Total fine = 10 + 25 + 20 = ₹55