By Matt N;

heres a example of making code shorter:

#include <iostream>
using namespace std;

int main()
{
cout << "Hello" << endl;
cout << "Hello" << endl;
cout << "Hello" << endl;
cout << "Hello" << endl;
cout << "Hello" << endl;
cout << "Hello" << endl;
cout << "Hello" << endl;
cout << "Hello" << endl;
cout << "Hello" << endl;
cout << "Hello" << endl;
return(0);
}

Outputs: 
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello

You can make that code alot faster, more efficient and flexable by doing it like this:

#include <iostream>
using namespace std;

void HelloFriend()
{
for(int i = 0; i <= 10; i++)
{
cout << "Hello" << endl;
}
}

int main()
{
HelloFriend();
return(0);
}

Outputs:
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello


 
Shorter and better!
Lets explain: i = 0, thats simple enough, i <= 10 means if i is less or equal to 10, i++ means add 1. so if i = 0, i++ will make it 1, and so on.
Now this is how it works, if i is less or equal to 10 output Hello, else, nothing. So each time it outputs hello i's value increases by 1 making it closer to ten, once it becomes 11 its no longer equal or less than 10 therefore stopping.