This code implement the lexical analyzer for a programming language with specification syntax, in which it have only three keyword "main", "if" and "for" also it support only three datatype integer, float and character; There no restriction on identifer length also it can be combined from character and numbers. The lexical analyzer in this code will ingore spaces,tabs and new lines but also counting numbers of line in the user code. In same time this lexical analyzer does not recognize any type of commment