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2 years ago
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#include <iostream> using namespace std; inline bool isPrime(int n) { if(n <= 1) { return false; } for(int i = 2; i*i <= n; i++) { if(n % i == 0) { return false; } } return true; } int main() { int n; cout << "Enter a positive integer: "; cin >> n; if(isPrime(n)) { cout << n << " is a prime number." << endl; } else { cout << n << " is not a prime number." << endl; } return 0; }
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