Demo of errors

 package com.company;

import java.util.*;
public class CWH_79_ErrorDemo {
    public static void main(String[] args) {
//        Write a program to print all prime number between 1 and 10
//        Logical error demo
        int n=20;
        double a=0;
        System.out.println(2);
        for(int i=3;i<=n;i++){
            for(int j=2;j<i;j++){
                a=i%j;
                if(a==0){
                    break;
                }
            }
            if(a!=0){
                System.out.println(i);
            }
        }
//Runtime error ---> Exception
        Scanner sc= new Scanner(System.in);
        int k= sc.nextInt();
        System.out.println("Integer part of 1000 divided by k is: "+1000/k);
    }
}