What happens if I read a map's value where the key does not exist?

Question

map dada;
dada[\"dummy\"] = \"papy\";
cout << dada[\"pootoo\"];

I\'m puzzled because I don\'t know if it\'s considered

Answer 1

For operator[], if you try to access a value for a key that doesn't exist, a new value object that has been default constructed will be put into the map and it's reference returned.