What is the function of the 'import' statement in programming?

• A. To export modules or libraries from a program
• B. To include modules or libraries in a program for function and class usage
• C. To declare a new variable
• D. To define a new function

Answer: (B)

The 'import' statement serves the purpose of including external modules or libraries into a program, thereby allowing access to their functions, classes, and variables. This is essential in programming as it promotes code reuse and helps in organizing code in a modular fashion. By importing a module, a programmer can utilize pre-written code, which saves time and effort in developing new features from scratch.

In most programming languages, the process of importing is straightforward; it allows developers to harness the functionality that is already defined in those modules without redefining them. This leads to more efficient coding practices and the ability to manage larger codebases more easily. For instance, in Python, when you import a library such as math, you can directly use its mathematical functions like sqrt() or sin().

The other choices do not accurately describe the purpose or functionality of the 'import' statement. They relate to different programming concepts, such as variable declaration and function definition, which are not associated with the action of importing modules.