prime numbers
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#include <iostream>
using namespace std;
int main() {
int n, i =1;
cin>>n;
int factor = 0;
while(i<=n){
if(n%i==0){
factor++;
}
i++;
}
if(factor==2){
cout<<"it is a prime number";
}
else{
cout<<"not a prime number";
}
return 0;
}
Cpp
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