Why do we use >> for cout for ex: cout<< and cin>> ? Why cant we use as cout>> and cin<<

Answer 1

Good Question!
<< is called insertion operator and >> is called extraction operator.

See the direction of the arrows.
cout << "yo"; means insert "yo" to output (screen).
cin >> num; means extract value of num from input.

Answer 2

its designed by the designer of the language.
its the syntax which can't be changed

Answer 3

Simply saying..,it's a syntax, we can't customize it.