C++ Program to Check Prime Number Using Function

C++ Program to Check Prime Number Using Function

Source Code:

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#include <iostream> using namespace std; int checkPrimeNumber(int); int main() { int n; cout << "Enter a positive integer: "; cin >> n; if(checkPrimeNumber(n) == 0) cout << n << " is a prime number."; else cout << n << " is not a prime number."; return 0; } int checkPrimeNumber(int n) { bool flag = false; for(int i = 2; i <= n/2; ++i) { if(n%i == 0) { flag = true; break; } } return flag; }

Enter a positive integer: 23
23 is a prime number.