Que has only font to acess but how p.back() is also working in queue please correct me where i am wrong

#1
#2

back() is also available for queue

Member functions of queue
(constructor) Construct queue (public member function )
empty Test whether container is empty (public member function )
size Return size (public member function )
front Access next element (public member function )
back Access last element (public member function )
push Insert element (public member function )
emplace Construct and insert element (public member function )
pop Remove next element (public member function )
swap Swap contents (public member function )

you can see documentation for more information

#3

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