A namespace

• A  section of code
• Delimited and referred to using a specific name
• Give a common name to that portion of code so that, when referring to it, only entities that are part of that section would referred to

A namespace is created to

• Set apart a portion of code with the goal to reduce, otherwise eliminate, confusion

How to use namespace

• Type the using namespace expression followed by the name of the namespace and a semi-colon (A-1)

Example of (A-1)

using namespace thebasic;

One of the namespaces used in C++

• Is called std (A-2)
  • After typing this, any part of the namespace becomes available to you

Example of (A-2)

using namespace std;

The iostream library

• Is part of the std namespace
  • When you use it, you don’t need to include the extended of the iostream file

You can start your program with (A-3):


Example of (A-3)

#include <iostream>
using namespace std;