Which naming convention is commonly used for appropriate variable names in programming?

CamelCase is a popular naming convention in programming for variable names, where the first letter of each word is capitalized except for the first one. This style enhances readability, particularly in code that may contain compound names. For instance, a variable that holds a user’s first name might be named userFirstName. This approach clearly distinguishes the different parts of the variable name while still keeping it to a single word-like format without spaces, which is essential in programming languages that do not permit spaces in identifiers.

In contrast, other naming conventions exist but serve different purposes or contexts. Snake_case uses underscores to separate words and is often favored in languages like Python. PascalCase capitalizes the first letter of every word, commonly used for defining classes in programming. Kebab-case involves using hyphens to join words and is typically not recommended for variable names due to conflicts with certain programming syntax. Each naming convention has its place, but CamelCase is particularly effective for variable naming.