Introduction
C++ is a popular programming language which is used by developers worldwide. While we write code in C++, we use identifiers to name variables, functions, classes, & other elements. Identifiers play a crucial role in making our code readable & understandable.
In this article, we will discuss what identifiers are, the rules for naming them, with some examples of valid & invalid identifiers in C++.
Rules to Name an Identifier in C++:
In C++, there are certain rules we need to follow when naming identifiers. These rules ensure that our code is consistent & follows the language standards. These rules are :
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Identifiers can only contain letters (a-z, A-Z), digits (0-9), & underscores (_). No other special characters are allowed.
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Identifiers cannot start with a digit. They must begin with a letter or an underscore.
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C++ is case-sensitive, which means uppercase & lowercase letters are considered different. For example, "myVariable" & "myvariable" are two different identifiers.
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Keywords (reserved words) in C++ cannot be used as identifiers. For instance, you cannot use "int" or "for" as an identifier name.
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Identifiers should be descriptive & meaningful. They should clearly indicate the purpose of the variable, function, or class they represent.
- It is good practice to use camelCase or snake_case when naming identifiers. For example: "myVariableName" or "my_variable_name".
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