1. Only alphabetic characters,digits and underscores are used.
2. The name cannot start with a digit
3. Uppercase and lower case letters are distinct.
4. Adeclared keyword cannot be used as a variable name.
-The difference between c and c++ is the limit on the length of a name.Since C recognizes only 32 characters in a name, c++ has no limit on the length of a character.
Francis Nkurumwa answered the question on February 9, 2018 at 14:17
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