What is the defining feature of snake_case?

The defining feature of snake_case is that it separates words with underscores and uses only lower-case letters. This convention is widely used in programming for naming variables and functions because it enhances readability without the need for spaces or additional formatting. By using underscores, each individual word is clearly delineated, making it easier for developers to parse the names at a glance. Using only lower-case letters helps maintain consistency and avoids complications that may arise from case sensitivity across different programming languages.

This style of naming is preferred in many programming languages to improve code clarity and maintainability. It stands out particularly in contexts where other naming conventions, such as camelCase or PascalCase, might be employed, emphasizing the straightforward and readable nature of snake_case.