for each loop in c++ by reference code example

Example 1: iterate over a range in c++

for (int i=0; i<5; ++i) {
  cout << i << " ";
}
// output is 0 1 2 3 4; note 5 is excluded since < is used and not <=

Example 2: range based for loop c++

for (<variable_declaration> : expression){
//statements
}