编辑代码

import java.util.Scanner
public class PrimeTest{
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        System.out.println("number?");
        int n=sc.nextInt();
        int i;
        for(i=2;i<n;i++)
            if(n%i==0)break;
        if(i==n)
        System.out.println(n+"is a prime number");
    else
        System.out.println(n+"is not a prime number");
    }
}