is it necessary to add "! "this sign at the end of cout

Answer 1

! is a operator
! = NOT Operator
like || or &&

Answer 2

no of course

Answer 3

no it's just the text that you need to write which you want to display in your program.

Answer 4

no

Answer 5

No because cout means printing of that statement which u enter in that for eg.
Cout<<"I m Garima";

Answer 6

No

Answer 7

no.

Answer 8

no

Answer 9

no

Answer 10

No its nt imp

Answer 11

nope