Why and what is use of name space std

Question

Plz tell me

Answer 1

I just picked this from Search (can't read it first)...so I'll edit another one in if this isn't right.

https://www.sololearn.com/discuss/93433/?ref=app

edit: looks fine. Search is your friend -- it worked for me, sight unseen :)

Answer 2

I got my answer as i used module