This is prime number program in java language. 
rime number is a number which is not divided by other number without 1and that number.
Here , we decided that we consider the first number and last number then in this number range prnt the prime number.  
Source Code:
  1. public class PrimeNo1 {
  2. public static void main(String[] args) {
  3. try (Scanner input = new Scanner(System.in)) {
  4. int i,j,count = 0,totalprime = 0;
  5. System.out.println("Enter the first number:");
  6. int num1 =input.nextInt();
  7. System.out.println("Enter the end number:");
  8. int num2 = input.nextInt();
  9. System.out.println("prime numbers are :");
  10. for(i=num1;i<=num2;i++) {
  11.   
  12. for(j=2;j<i;j++) {
  13.     if(i%j==0) {
  14.     count++;
  15.      break;
  16. }
  17. }
  18. if(count==0) {
  19. System.out.print(i+" ");
  20. totalprime++;
  21. }
  22.     
  23. count = 0;
  24.            }
  25. System.out.println();
  26. System.out.println("Total Number of Prime Numbers are = "+totalprime);
  27. }
  28.   }
  29. }

Output:

Enter the first number:
5
Enter the end number:
50
prime numbers are :
5 7 11 13 17 19 23 29 31 37 41 43 47 
Total Number of Prime Numbers are = 13


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