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Across

1. A collection of subroutines that can be reused in different programs or modules.

2. Changing the case (uppercase or lowercase) of characters within a string.

3. The process of dividing a program into separate functions or procedures to make it more organized and easier to maintain.

4. The ability to use existing subprograms from a library in new programs, reducing redundancy and improving efficiency.

5. The process of simplifying complex subprogram implementations, allowing programmers to use them without needing to understand the underlying details.

6. The division of a program into smaller, independent modules, making it easier to understand and maintain.

7. A collection of reusable subprograms that can be used in a program.

8. A system that records changes to a file or set of files over time, so that you can recall specific versions later.

9. The process of restructuring existing computer code without changing its external behavior, improving readability and maintainability.

10. The method used to extract a subset of characters from a string.

11. The number of positions to skip between characters in the slice.

12. The position of a character starting from the end of the string.

Down

13. Mistakes in the syntax of a programming language that prevent the code from being executed or compiled correctly.

14. Dividing a string into multiple substrings based on a specified separator.

15. A programming technique involving a function that calls itself to solve a problem.

16. Subprogram libraries promote the use of consistent coding practices throughout different programs.

17. Code that can be used again in multiple programs or modules without having to rewrite it.

18. A variable declared outside any function or procedure, which can be accessed from any part of the program.

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