What is snake_case? – Complete Guide with Examples
Published 2026-02-20 · convertcase.in
snake_case is a naming convention where words are separated by underscores and all letters are lowercase. The result lies flat like a snake — hence the name.
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1Examples
my_variable, get_user_name, this_is_snake_case
2Where It's Used
Python (PEP 8 standard), Ruby, SQL databases, Rust, file naming in Linux, environment variables.
3SCREAMING_SNAKE_CASE
The all-uppercase variant (MY_CONSTANT) is used for constants: MAX_RETRY_COUNT, API_BASE_URL.
Frequently Asked Questions
Why does Python use snake_case?
PEP 8, Python's official style guide, specifies snake_case for function and variable names because it is highly readable.