Java Program to Find Prime Numbers in a Given Range

This is a Java Program to Find Prime Numbers Within a Range of n1 and n2.

Enter the upper and lower limits as input. Now we use modulus operation along with double for loops and if-else conditions to get the output.

Here is the source code of the Java Program to Find Prime Numbers Within a Range of n1 and n2. The Java program is successfully compiled and run on a Windows system. The program output is also shown below.

import java.util.Scanner;
public class Prime
{
    public static void main(String args[])
    {
         int s1, s2, s3, flag = 0, i, j;
         Scanner s = new Scanner(System.in);
         System.out.println ("Enter the lower limit :"); 
         s1 = s.nextInt();
         System.out.println ("Enter the upper limit :"); 
         s2 = s.nextInt();
         System.out.println ("The prime numbers in between the entered limits are :");
         for(i = s1; i <= s2; i++)
         {
             for( j = 2; j < i; j++)
             {
                 if(i % j == 0)
                 {
                     flag = 0;
                     break;
                 }
                 else
                 {
                     flag = 1;
                 }
             }
             if(flag == 1)
             {
                 System.out.println(i);
             }
         }
    }
}

Output:

$ javac Prime.java
$ java Prime
 
Enter the lower limit :
2
Enter the upper limit :
20
The prime numbers in between the entered limits are :
3
5
7
11
13
17
19

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