# Naming Conventions

A rule or standard for how variables are named in a programing language.

## What are popular **naming conventions** in programming?

Each programming language has their own set of 
rules and standards for variable naming conventions.

Here are some of the common conventions that you will 
see. Being **consistent** in your naming style throughout
your code is critical. 


* **`camelCase`** - first letter lower case - 
each new word upper case. This is the most common
style in modern programming languages
* **`PascalCase`** - the first letter of each 
word upper case - common for class names in many modern
languages but also often used for function/method names
* **`lowercase`** - all letter lower case - no spaces
* **`snake_case`** - all letters lower case - 
underscore for spaces - common for databases like
PostgreSQL because table and column names do not 
support upper case letters
* **`ALL_CAPS`** - all letters UPPER CASE - under 
score for spaces - common for constant declarations
in some programming languages
* **`kebab-case`** - all letters lower case - 
underscore for spaces - common in CSS for id and class
naming standards
* **`_underscorePrefix`** - private variables are 
often prefixed with an underscore - it is less common
in modern languages, but still in use
* **`strHungarianNotation`** - prefix the variable 
with the type stored in the variable (old school) - 
this is uncomon in modern languages partly because in modern
languages there are too many types to be able to 
prefix everything.

Level: Novice · [More General terms at this level](https://www.ask-codey.com/glossary/subjects/general/novice)

Updated: October 12, 2026

Source: https://www.ask-codey.com/glossary/naming-conventions