In coding, a 'code snippet' is best defined as?

A 'code snippet' is defined as a small re-usable piece of code. These snippets are typically designed to accomplish a specific task or function within a program and can be easily inserted into larger codebases. Code snippets improve efficiency by allowing developers to reuse code components instead of rewriting the same code multiple times. They can contain anything from a simple function to a few lines that set up variables or execute a particular block of logic. This modularity is important for maintaining code clarity and reducing redundancy in programming.

The other definitions do not align with the common understanding of a code snippet. Large sections of program code represent extensive codebases rather than concise reusable parts. A complete software application encompasses an entire system rather than a small piece of functional code. Furthermore, while debugging tools certainly contribute to the coding process, they do not fit the definition of a code snippet which focuses on code reusability and modularity.