camelCase vs PascalCase vs snake_case: What’s the Difference?

In programming, variable naming conventions help make code more consistent and readable. Three of the most common are camelCase, PascalCase, and snake_case.

camelCase

First word lowercase, each subsequent word capitalized. Example: myVariableName.

PascalCase

Every word starts with a capital letter. Example: MyVariableName.

snake_case

Words are separated by underscores. Example: my_variable_name.

Each has its use case—camelCase for JavaScript, PascalCase for C# classes, and snake_case for Python variables.