C++ vs Ruby Loop

Vector<int> my_array = new Vector<int>;

my_array.add(1);
my_array.add(2);

for (int i = 0; i < my_array.length(); i++){
	
}

foreach(int i in my_array) {
	
}


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


0..9.each { |i| puts "i: #{i}" }

0..9.each do |i|
  puts "i: " + i
end