Naming conventions and rules of variables in JavaScript.
In JavaScript, variable names follow specific rules and conventions.
Rules:
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Must start with a letter or underscore_: Variable names must begin with a letter (a-z or A-Z) or an underscore (_).
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Can contain letters, digits, and underscores_: Variable names can include letters (a-z or A-Z), digits (0-9), and underscores (_).
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Cannot contain special characters: Variable names cannot include special characters like !, @, #, $, etc., except for underscore (_).
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Case-sensitive: JavaScript variable names are case-sensitive.
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Cannot be reserved words: Variable names cannot be reserved words like
var,let,const,if,else, etc.
Conventions:
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Use meaningful names: Use descriptive and meaningful variable names to improve code readability.
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Use camelCase: JavaScript conventionally uses camelCase for variable names, where the first letter is lowercase and subsequent words are capitalized.
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Avoid abbreviations: Avoid using abbreviations unless they are widely accepted and understood.
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Be consistent: Follow a consistent naming convention throughout your code