All Notes on BCA

import java.*;
import java.io.*;
import java.util.*;

class Prime_n
{
 public static void main(String args[])
  {
   Scanner sc = new Scanner(System.in);
   System.out.print("Enter Starting Limit :");
   int l1 = sc.nextInt(); 
 
   System.out.print("Enter Ending Limit :");
   int l2 = sc.nextInt(); 
   System.out.println("Prime Number : ");
 
   for(int i=l1;i<=l2;i++)
    {
      increment(i);
     } 

   }


 public static void increment ( int n) 
 {
   
  int j,f=1;
 for(j=2;j<=n/2;j++)
  {
    if(n%j==0)
    {
       f=0;
       break;
    }
  }
 if(f==1)
  System.out.println(" "+n);
  else
  {
   System.out.print("");
   }
      
   }  
}

INTPUT

Enter Starting Prime_n : 20
Enter Starting Prime_n : 40

OUTPUT

Prime Number : 
 23
 29
 31
 37