Bài 5. Viết chương trình liệt kê tất cả các số nguyên tố nhỏ hơn n cho trước.

import java.util.Scanner;

public class Main {

    public static void lietKe(int n){

                        System.out.print(" 2");

                        for(int i=3;i<n;i+=2){

                                    if(cachamchung.checkSNT(i))System.out.print(" "+i);

                        }

            }

    public static int nhap(){

                        Scanner input= new Scanner(System.in);

                        boolean check= false;

                        int n=0;

                        while(!check){

                                    System.out.print(" ");

                                    try{

                                                n= input.nextInt();

                                                check= true;

                                    }catch(Exception e){

                                                System.out.println("Ban phai nhap so! hay nhap lai...");

                                                input.nextLine();

                                    }

                        }

                        return (n);

            }

    public static void main(String[] args) {

                System.out.print("Nhap n");

                        int n= nhap();

                        System.out.println("Cac so nguyen to nho hon "+n+ " ");

                        lietKe(n);

    }

}