The below program checks if a number is a prime or a composite number. The CPP cout object is used to output the result on the screen.
Code:
#include <iostream.h> using namespace std; int main() { int x,i; int count = 0; cout << "Enter a number:"; cin >> x; for (i=1; i<=x; i++) { if ((x % i)==0) count++; } if (count<3) cout << x << " is a prime number."; else cout << x << " is not a prime number."; return 0; } |
Output
Enter a number:13 13 is a prime number. |
