LEXICAL ANALYSIS
ROLE OF THE LEXICAL ANALYZER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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line by line
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word by word
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letter by letter
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reads the whole program
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Detailed explanation-1: -Lexical analysis is the first phase of a compiler. It takes modified source code from language preprocessors that are written in the form of sentences. The lexical analyzer breaks these syntaxes into a series of tokens, by removing any whitespace or comments in the source code.
Detailed explanation-2: -A lexical analyzer is also called a “Scanner". Given the code’s statement/ input string, it reads the statement from left to right character-wise. The input to a lexical analyzer is the pure high-level code from the preprocessor.
Detailed explanation-3: -The lexical analysis is the first phase of the compiler where a lexical analyser operate as an interface between the source code and the rest of the phases of a compiler. It reads the input characters of the source program, groups them into lexemes, and produces a sequence of tokens for each lexeme.