I am writing an article by just simply using
\documentclass[11pt,a4paper,onesided]{article}. I would like to know how can I put the number 1 that appears at the very beginning of a paragraph in the picture:
This is not a thesis or something related, it is just a simple article containing four pages.



\paris used in many other places, not just for introducing a paragraph break. – Werner Jun 25 '19 at 15:37