c++ identifier naming rules

c Identifier naming rules: 1. Identifiers are composed of letters, numbers and underscores; 2. The c keyword cannot be used as an identifier; 3. The identifier length is limited to 32 characters; 4. Identifier pairs Case sensitive; 5. The first letter can only be letters or underscores, not numbers.

c Identifier naming rules:

(recommended learning:C language tutorial)

• Identifiers consist of letters, numbers and underscores

• Cannot use C keywords as identifiers

• Identifier length limit is 32 characters

• Identifiers are case-sensitive

• The first character can only be a letter or an underscore, not an number

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