How to do strikethrough in markdown

To make any portion of the text strikethrough in markdown all we need to do is add two tildes ~ before and after it like so:

This is ~~strikethrough~~

which will give us the following:

This is strikethrough

Similarly, almost all text editors (MDTX included) achieve the same via a strikethrough S button. When pressed it will add four tildes and any text written between them will be strikethrough, or you can just highlight what you want to be strikethrough and then press the S button to achieve the same result.