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wha is the use of using namespace std; in c++

11/22/2018 2:56:05 PM

Favaslfavas

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using namespace std; is used for using the built in keywords of c++ like cin, cout , map , victor etc. If we did't write at the top of program then we have write every time when as prefix like std : : cout<<"" like this. for more details use google. hope you understand.