how to create line with the svg in html?

Answer 1

<svg height="210" width="500">
  <line x1="0" y1="0" x2="200" y2="200"style="stroke:rgb(255,0,0);stroke-width:2" />
</svg>

source:
https://www.w3schools.com/graphics/svg_line.asp

Answer 2

With <line> ;)