What is the meaning of using namespace std in C++?
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std is an abbreviation of standard. std is the standard namespace. cout, cin and a lot of other things are defined in it. ( This means that one way to call them is by using std::cout and std::cin.) The keyword using technically means, use this whenever you can. read more
std: The std namespace (where features of the C++ Standard Library, such as string or vector, are declared). After you write this instruction, if the compiler sees string it will know that you may be referring to std: : string, and if it sees vector, it will know that you may be referring to std: : vector. read more
std is an abbreviation of standard. std is the standard namespace. cout, cin and a lot of other things are defined in it. (This means that one way to call them is by using std: : cout and std: : cin.) The keyword using technically means, use this whenever you can. read more
