camelCase vs snake_case: Which Naming Style Should You Use?

Both styles are valid. The right choice depends on language conventions and where the identifier is used.

Quick Rule

• Use camelCase in JavaScript/TypeScript for variables and functions.
• Use snake_case in Python for variables and functions (PEP 8).
• Use snake_case for SQL table/column names in most teams.
• Use one style per surface and keep it consistent.

Examples

Team Strategy

Define conventions in your README and lint rules. Inconsistent naming causes avoidable bugs and slows onboarding.