Write a Program find Next Prime number in C++.

Next Prime number in C++.

#include<iostream>

using namespace std;

int main()

{

int p,q=2,number;

cout<<"Enter any num: ";

cin>>number;

cout<<"Next prime num: ";

for(p=number+1;p<3000;p++)

{

for(q=2;q<p;q++)

{

if(p %q==0)

{

break;

}

}

if(p==q || p==1)

{

cout<<"\t"<<p;

break;

}

}

return 0;

}

OUTPUT

Enter any num: 21

Next prime num: 23