Why we not use "" at the end of program to print enything means in this program they use cout << a .. they dont use"" so why...?

Answer 1

If you use:int 10; cout<<"a" , in console will print a , and if you use: int 10; cout<<a;
, console will be print 10.

Answer 2

If you use:int 10; cout<<"a" , in console will print a , and if you use: int 10; cout<<a;
, console will be print 10.