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Naming rules and specifications for identifiers
2022-06-28 09:48:00 【Autonomous watermelon L】
Identifier is a user-defined name when programming , For example, the name of the class 、 The name of the method, the name of the variable, etc , All identifiers .
Naming rules and specifications of identifiers
1. Identifier can contain English letters 26 individual （ Case sensitive ）、0-9 Numbers 、$（ Dollar symbol ） and _（ Underline ） etc. .
2. Identifier cannot begin with a number .
3. Identifier cannot be a keyword .
4. Identifiers are strictly case sensitive .
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