Identifier name rules
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Different programming languages have different rules on how identifiers can be named.
General rules
In most programming languages, you must follow these identifier naming rules:
- The identifier cannot contain spaces
- The identifier can contain only numbers, letters and underscores
- The identifier must not start with a number
Identifier naming conventions
While not rules, most programming languages have conventions you should follow.
There are also good practices to name your identifier as clearly as possible.