Question

We can not use variable in a program which is defined in namespace. State Whether True or False

Answer 1

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We can not use variable in a program which is defined in namespace it is false.
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Answer 2

False, Namespaces allow us to group named entities that otherwise would have global scope into narrower scopes, giving them namespace scope.

This allows organizing the elements of programs into different logical scopes referred to by names.

A namespace is a feature added in C++ and not present in C.

A namespace is a declarative region that provides scope to the identifiers (names of the types, function, variables, etc) inside it.

Many namespace blocks with the corresponding name are provided.

All claims within those blocks are listed in the specified scope.