Keywords & Tokens

1 Keywords

Keywords are the words whose meaning has already been explained to the C compiler. The keyword cannot be used as the variable name. If we try to do so we are trying to assign new meaning to the keyword. The keywords are also known as ‘Reserved words’. Following are 32 keywords available in C.

int                      signed                 typedef                      auto                    for                    const
char                   unsigned             enum                        extern                  while                volatile
float                   short                   register                         do                    sizeof               double             

long                      static                     if                           goto                struct              void      else                     continue               union                     return               switch            default                   break                    case                                                           

Restrictions apply to keywords

  • Keywords are the words whose meaning has already been explained to the C compiler and their meanings cannot be changed.
  • Keywords can be used only for their intended purpose.
  • Keywords cannot be used as user-defined variables.
  • All keywords must be written in lowercase.