Code comparison refers to the process of comparing two or more sets of code to identify similarities, differences, redundancies, errors, or potential improvements. This can be done manually by examining the code line by line, or through automated tools that analyze and compare code based on various criteria such as syntax, structure, functionality, or performance. Code comparison is a common practice in software development to ensure code quality, maintainability, and collaboration among team members. It is also used in code review processes, code refactoring, and version control systems to track changes and updates to code.