// just example for explanation :)

    // vector containt strings

    vector<string> USERS;

    // take string from 'USERS' 

    // under name 'user' in each time :)

    for(string user : USERS){

        std::cout << user << std::endl;

    }

​

for ( int i = 0; i < 5; i++)

{

  cout << "Hello" << endl;

}

// prints hello 5 times. 

for (int i = startPoint; i<index ; i++ // or i--){

    //Do something...

}

for (int i = start; i < stop; i = i + step){

    // statement 1

    // statement 2

    // etc

}

for (<exp_1>; <exp_2>; <exp_3>){

    // loop body

}

for (int i=0; i<10; ++i);

​

​

// REMEMBER TO REPLACE '???' 

//    with the data structure to iterate on

​

for(int i=0; i<???; ++i) {}

for(auto it=???.begin(); it!=???.end(); ++it) {}

for(auto &obj : ???) {}

for ( initialization;condition;increment ) {

   statement(s);

}

what is for in c++

#include iostream

using namespace std;

​

int main{

  for(int i=0; i<100; i++)

  {

    cout<<"Hello World";

  }

  return 0;

}