When defining an identifier in a programming language, which of the following best represents a rule generally applied across many programming languages?
Can start with a # symbol
Allows special characters like @, $, % within the name
Must start with a letter
Can contain spaces between words
In many programming languages, identifiers, which include variable and function names, must start with a letter. They cannot begin with a number, and though they can contain numbers, the first character must not be a number. Additionally, spaces are not allowed in identifiers; instead, underscores are often used to separate words.
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