Final answer:
Libraries let you write programs at a higher level by providing pre-built functions and modules. Testing is important when building and sharing libraries to ensure reliability and catch any bugs or issues. Documentation created during testing helps other programmers understand and use the library effectively.
Step-by-step explanation:
Libraries allow programmers to write programs at a higher level by providing pre-built functions and modules that can be reused in different projects. Instead of having to write complex code from scratch, programmers can simply call the functions or use the modules provided by the library.
Testing is important when building and sharing libraries because it ensures the reliability and functionality of the library. By testing the library, developers can catch and fix any bugs or issues before sharing it with others. This helps to prevent problems and improve the overall quality of the library.
Additionally, testing allows developers to document the library properly, making it easier for other programmers to understand how to use it and what to expect from it. This documentation also serves as a guide for future maintenance and enhancements of the library.