Display strike (crossed-out or cancelled) text

Want to know how to display text like wrong spelling right spelling? This post will be what we call "self-study" post, that is, to learn how to do it, examine the codes I used to display above in the scroll box (the horizontal or vertical scroll bar may not be displayed if what is inside the scroll box in not long enough for the size of the scroll box):

<del>wrong spelling</del> <ins>right spelling</ins>

You can study the codes, understand it and then do it yourself, or if you are lazy, just copy-paste into your post editor and just replace the "wrong spelling"..... with what you want.

Now the above may not be what you want. Perhaps you want this is not what I want.

Look the the HTML I used for the above below (this can be mighty confusing, above and below. You go figure what I mean by that):

<strike>this is not what I want</strike>