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1. identifiers beginning with a letter 2. identifiers beginning with an underscore
all keywords
Yes they is different, C language are case-sensitive.
Identifiers are a bit more generic in the context of programming. If you mean, in terms of the C languages (C, C++, C#), the question is the reverse...keywords may NOT be used as identifiers. For example, you cannot use keywords such as "int", "float", "double", etc. as the names of variables or objects.
In order to claim compliance with ANSI C standards, the minimum maximum for internal identifiers and macros is 63 characters, and external identifiers is 31 characters. Vendors are encouraged to avoid imposing a maximum value whenever possible.
1. identifiers beginning with a letter 2. identifiers beginning with an underscore
all keywords
Yes they is different, C language are case-sensitive.
C, o, u, e
C, o, u, e
Identifiers are a bit more generic in the context of programming. If you mean, in terms of the C languages (C, C++, C#), the question is the reverse...keywords may NOT be used as identifiers. For example, you cannot use keywords such as "int", "float", "double", etc. as the names of variables or objects.
An identifier is a name. All names must be declared with a type.
If you mean 'are identifier of an object and nameof an object synonyms?', then yes, they are.
In order to claim compliance with ANSI C standards, the minimum maximum for internal identifiers and macros is 63 characters, and external identifiers is 31 characters. Vendors are encouraged to avoid imposing a maximum value whenever possible.
An example of a valid class C address would be 192.168.6.200
Not o,e,r,u
No. Keywords are reserved and cannot be used as identifiers. However, C/C++ is case-sensitive. So although register is a reserved keyword, Register is not.