Code-clone detection is a research area within software engineering that focuses on identifying and analyzing sections of code that are duplicated or very similar within a software system. Code clones can lead to maintenance issues, as changes made to one instance of the code may need to be replicated in multiple other instances. Code-clone detection techniques involve comparing code snippets or files to detect similarities in structure, syntax, or semantics. These techniques can help developers identify redundant code, improve code quality, and reduce the effort required for maintenance and debugging. There are different approaches to code-clone detection, including text-based, token-based, and tree-based methods. Researchers in this field work on developing more accurate and efficient algorithms for detecting code clones and tools to assist developers in managing and refactoring duplicated code in their projects.