Keywords Identifiers and Data types in C











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#keywords : • Keywords are the predefined words whose are already defined C compiler for a particular task. • #identifiers : • Identifiers are the name of any variable, constant, array, function or structure etc. • Rules of identifiers: • The first letter must be an alphabet or underscore. • blanks are not allowed. • No special symbol (except underscore) are allowed. • No keywords are allowed as an identifier. • Operators are not allowed in identifiers. • Identifiers names are case sensitive. • #datatypes : • There are four basic data types: • 1) character • 2) integer • 3) float • 4) Double

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