Analysis Phase

              As translation progress the compiler's internal representation of source program

 change  

                         Position: = initial=RATE*60.

              The lexical analyzer phase needs the character in the source program and

groups them into a stream of tokens in which each token represents a logically cohesive

 sequence of character, such as an identifier, keyword(if, while, etc....)punctuation character,

or a multi-character operator like := the character sequence forming a tokens is called

the lexeme for the tokens

           Certain tokens will be augmented by "a lexical value".

 For example when an identifier like rate in found, the lexical analyzer not only generates

a tokens say id, but also enters the lexeme rate into the symbol table, if it is not already there.

The lexical value associated with this occurrence of 'id' point to the symbol table entry for

rate