Main / Family / Namespace std
Keep in mind that the std namespace has tons of identifiers, many of which are . using std::cout; // a using-declaration lets you use cout without qualification. E.g. if you add using namespace std; you can write just cout instead of std::cout when calling the operator cout defined in the namespace std. Then also we need to type 'using namespace std' otherwise the code throws an error. So my question is what is the necessity of using this.
25 Aug std is an abbreviation of standard. std is the standard namespace. cout, cin and a lot of other things are defined in it. you can also call these functions using. 15 Feb Have you ever wondered why do we put 'using namespace std' on the top of our code in C++. What is namespace?, Is it really necessary to. Namespaces in C++ - Learn C++ in simple and easy steps starting from basic to #include using namespace std; // first name space namespace.
The statement using namespace std is generally considered bad practice. The alternative to this statement is to specify the namespace to which the identifier. 15 Oct - 6 min - Uploaded by thenewboston C++ Programming Tutorial - 9 - using namespace std; Trick . I suggest not using namespace. 12 Feb - 3 min - Uploaded by CppNuts If any doubt or want to clarify something go ahead and ask in comment section. +. 28 Oct I've read conflicting reports but it is generally agreed that using namespace std; is bad practice and you should use the std:: prefix whenever. Probably not. People don't like typing std:: over and over, and they discover that using namespace std lets the compiler see any std name, even if unqualified.
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