What are Keywords in C? Keywords are preserved words that have special meaning in C language. The meaning of C language keywords has already been described to the C compiler. These meaning cannot be changed. Thus, keywords cannot be used as variable names because that would try to change the existing meaning of the keyword, which is not allowed.(Don't worry if you do not know what variables are, you will soon understand.) There are total 32 keywords in C language. auto double int struct break else long switch case enum register typedef const extern return union char float short unsigned continue for signed volatile default goto sizeof void do if static while What are Identifiers? In C language identifiers are the names given to variables, constants, functions and user-define data. These identifier are defined against a set of rules. Rules for an Identifier An Identifier can only have alphanumeric characters(a-z , A-Z , 0-9) and underscore( _ ). The fir...
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