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Thread: Count Prime Numbers
- 10-18-2012, 05:42 AM #1
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Count Prime Numbers
I have to count, how many prime numbers exist, but it give me wrong answer: Exactly 1254 prime numbers exist between 1 and 10,000.
can you tell me why? Thank you!
Java Code:// Verify Prime Number private static boolean isPrime(int prime) { for(int i = 2; i < Math.sqrt(prime) ; i++) { if ((prime % i) == 0) { return false; } } return true; } // Calculate Prime private static int countPrimes(int number){ int count =0; for(int i=2; i<=MAX_PRIME; i++) { if(isPrime(i)){ count++; } } System.out.println("Exactly "+ count + " prime numbers exist between "+number + " and 10,000."); return count; }
- 10-18-2012, 07:18 AM #2
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