LaTeX editors come in handy when you are writing your paper in LaTeX. On the basis of the above, what is a LaTeX editor? Simply put, a LaTeX editor is an online/offline app which enables you to write, edit and publish your paper in LaTeX. In short, it is a document preparation system which is predominantly used for technical or scientific writing and publishing. Whatever LaTeX command you use are basically a set of TeX commands being compiled underneath. It was built by Leslie Lamport way back in the ’80s.
So, what is LaTeX? Put simply, LaTeX is a set of macros (or macro packages) built on top TeX. TeX is mainly popular because of its ability to handle complex technical text and in displaying mathematical formulae. TeX is an advanced typesetting system which was majorly developed by Donald Knuth. Before addressing what a LaTeX editor is, let us see what TeX and LaTeX are.