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reserved and keywords

 
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Differnce between reserved words and keywords?
 
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A reserved word is a word that is reserved for special use by the language. Reserved words are system identifiers and cannot be used by the programmer as a user identifier.

Technically a keyword is a reserved word that is currently used by the language with a special purpose.

Therefore all keywords are reserved words, however some reserved words are not keywords yet. The may be so at a later date.

For example, const and goto are reserved words and not keywords yet, they are reserved for later use.
 
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