What is namespace in XML with examples?

An XML namespace is a collection of names that can be used as element or attribute names in an XML document. The namespace qualifies element names uniquely on the Web in order to avoid conflicts between elements with the same name.

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Why is using namespace std considered a bad practice?

While this practice is okay for example code, pulling in the entire std namespace into the global namespace is not good as it defeats the purpose of namespaces and can lead to name collisions. This situation is called namespace pollution. What is namespace std in C Plus Plus? It is known that “std” (abbreviation for the standard) is a namespace whose members are used in the program. So the members of the “std” namespace are cout, cin, endl, etc. This namespace is present in the iostream. h header file.

How do you include a namespace std in C++?

1.4 C++ and C libraries and the std namespace

1. Specify the standard namespace, for example: std::printf("example\n");
2. Use the C++ keyword using to import a name to the global namespace: using namespace std; printf("example\n");
3. Use the compiler option --using_std .

What is the biggest advantage of using namespaces? The biggest advantage of using namespace is that the class names which are declared in one namespace will not clash with the same class names declared in another namespace. It is also referred as named group of classes having common features.

What is the difference between Iostream and namespace std?

Both are completely different things. The former is a preprocessor directive to copy all the contents of “iostream” header file in the current file while the later is used to use include std in the global namespace. Can we compile a program without main () function? yes it is possible to write a program without main(). But it uses main() indirectly. The '##' operator is called the token pasting or token merging operator. That is we can merge two or more characters with it.

What is difference between \n and Endl?

Both endl and \n serve the same purpose in C++ – they insert a new line. However, the key difference between them is that endl causes a flushing of the output buffer every time it is called, whereas \n does not. How do you use N in python? In Python, the new line character “\n” is used to create a new line. When inserted in a string all the characters after the character are added to a new line. Essentially the occurrence of the “\n” indicates that the line ends here and the remaining characters would be displayed in a new line.

Why do we use \n in c?

\n (New line) – We use it to shift the cursor control to the new line. \t (Horizontal tab) – We use it to shift the cursor to a couple of spaces to the right in the same line.