I'm reading the content of The TexBook then I realized the big difference between LaTeX and TeX. The fact is that LaTeX pre-programs huge things, like sections, titles, paragraphs, so the user does not have to always type it like he should do in TeX.
But I'm using TexWorks and when I see my saved .tex file it has LaTeX content, not only TeX. Why?
.tex, so everybody uses it for all kind of files, be they Plain TeX or LaTeX. You can choose from within TeXworks the engine for compiling the document. – egreg May 06 '14 at 17:22.texfile generated from LaTeX input. – egreg May 06 '14 at 19:44