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Find Prime numbers between two numbers in Java

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Find Prime numbers between two numbers in Java

In this example, we will see a Java program through which we can find all the Prime numbers present between two given numbers.

Program


import java.util.Scanner;  
public class Main 
{  
   public static void main(String[] args) 
   {  
       Scanner s = new Scanner(System.in);  
       System.out.print("Enter the first number : ");  
       int start = s.nextInt();  
       System.out.print("Enter the second number : ");  
       int end = s.nextInt();  
       System.out.println("List of prime numbers between " + start + " and " + end);  
       for (int i = start; i <= end; i++) 
	   {  
           if (isPrime(i)) 
		   {  
               System.out.println(i);  
           }  
       }  
   }  
   public static boolean isPrime(int n) 
   {  
       if (n <= 1) 
	   {  
           return false;  
       }  
       for (int i = 2; i <= Math.sqrt(n); i++) 
	   {  
           if (n % i == 0) 
		   {  
               return false;  
           }  
       }  
       return true;  
   }  
}

Output:
Enter the first number : 1
Enter the second number : 39
List of prime numbers between 1 and 39
2
3
5
7
11
13
17
19
23
29
31
37

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