Here are the special symbols: 

+ * / <> < <= > >= := i 

Alternative special symbols: 

(. for [ .) for] @ or A for i 

Word symbols (or reserved words) are normally underlined in the hand-written program to emphasize their interpretation as single sym­ bols with fixed meaning. You may not use these words in a context other than that explicit in the definition of Pascal: in particular, these words may not be used as identifiers. They are written as a sequence of upper­ case or lower--case letters (without surrounding escape characters). Here are the word-symbols: 

## I.C. Identifiers 

and array begin case const div do downto else 

end file for function goto if in label mod 

nil not of or packed procedure program record repeat 

set then to type until var while with 

Identifiers are names denoting constants, types, bounds, variables, pro­ cedures, and functions. They must begin with a letter, which may be fol­ lowed by any combination and number of letters and digits. The spell­ ing of an identifier is significant over its whole length. Corresponding upper--case and lower--case letters are considered equivalent. 

