Difference between Underscore and Underline

What is the difference between Underscore and Underline?

Underscore as a noun is an underline; a line drawn or printed beneath text; the character . while Underline as a noun is a line placed underneath a piece of text in order to provide emphasis or to indicate that it should be viewed in italics or that it acts as a hyperlink

We hope you now know whether to use Underscore or Underline in your sentence.