13.cpp

#include<iostream>
using namespace std;
int main(){
 int i,n,count;
 cout<<"Enter the value of i";
 cin>>i;
 if(n<2){
 cout<<"Not prime not composite";
 }
 else if(n==2){
 cout<<"Number is prime"<<endl;
 }
 else{
 for(i=2;i<=n-1;i++)
 {if(n%1==0) {count++;}}
 if(count>0)
 {cout<<"Number is not a prime number"<<endl;}
 else{cout<<"Number is a prime number";}
 }
 return 0;
}