This is my program in which I am facing resource leak issue:

import java.util.*;




public class MarksSheetForLoop {
public static void main(String args[]) {
    Scanner sc = new Scanner(System.in);
    int input = 1;




    // using for loop
        System.out.println `your text`("Using for loop");
        for (; input == 1;) {
        System.out.print (" Enter Marks = " );
        int marks = sc.nextInt();

        // grade
        if (marks >= 90 && marks <= 100) {
        System.out.println (" GOOD ");
        } else if (marks >= 60 && marks <= 89) {
            System.out.println("ALSO GOOD");
        } else if (marks >= 0 && marks <= 59) {
            System.out.println("GOOD AS WELL");
        } else {
            System.out.println("INVALID MARKS");
        }
        // continue
        System.out.println("Want to continue? 1[YES] or 2[NO]");
        input = sc.nextInt();
        }

        if (input == 2) {
        System.out.println("For Loop End");
        } else {
        System.out.print("Invalid Input");
        }

        // using do-while loop
        System.out.println("Do-While Loop");
        do {
        System.out.print("Enter Marks= ");
        int marks = sc.nextInt();

        // grade
        if (marks >= 90 && marks <= 100) {
            System.out.println("GOOD");
        } else if (marks >= 60 && marks <= 89) {
            System.out.println("ALSO GOOD");
        } else if (marks >= 0 && marks <= 59) {
            System.out.println("GOOD AS WELL");
        } else {
            System.out.println("INVALID MARKS");
        }

        // continue
        System.out.println("Want to continue? 1[YES] or 2[NO]");
        input = sc.nextInt();

        } while (input == 1);
        if (input == 2) {
        System.out.println("Do-While Loop End");
        } else {
         System.out.println("INVALID INPUT");
        }

        // using while loop
        System.out.println("Using While Loop");
        input = 1;
        while (input == 1) {
        System.out.print("Enter Marks= ");
        int marks = sc.nextInt();

        // grade
        if (marks >= 90 && marks <= 100) {
            System.out.println("GOOD");
        } else if (marks >= 60 && marks <= 89) {
            System.out.println("ALSO GOOD");
        } else if (marks >= 0 && marks <= 59) {
            System.out.println("GOOD AS WELL");
        } else {
            System.out.println("INVALID MARKS");
        }

        // continue
        System.out.println("Want to continue? 1[YES] or 0[NO]");
        input = sc.nextInt();
        }
        sc.close();                                       
        if (input == 0) {
        System.out.println("END");
        } else {
        System.out.println("INVALID INPUT");
        }
           sc.close();
}

}

I was practicing the loops but compiler is showing a resource leak even after closing the scanner. Although I closed the scanner but I don’t understand where should I close it. Should I open and close it multiple times, as in , in every loop or is only once enough?