Furthermore, independent software development teams often break these rules when corner cases are encountered. Variable naming conventions, such as snake case or camel case, are standardized differently for each programming language. But as object-oriented derivations of JavaScript, such as TypeScript, AngularJS and Node.JS, gained popularity, camel case has become the standard. When browser-based programming with HTML and JavaScript first emerged, snake case was a common approach to variable and method naming. Scripting languages, as demonstrated in the Python style guide, recommend snake case in the instances where C-based languages use camel case. Screaming snake case is used for variables. Languages such as Java and Kotlin, which have a C and C++ heritage, use lower camel case for variables and methods, and upper camel case for reference types such as enums, classes and interfaces. While individual languages specify their own naming conventions, there is little consistency across languages regarding camel case versus snake case usage. When it is not, it is often referred to as lower camel case. When the first letter of a camel-cased variable is uppercase, it is also known as Pascal case or upper camel case. The following are examples of variables that use the camel case naming convention:
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