Go to your computer. Open Microsoft Office Word, Google Docs, etc. Just make sure you can type on it.
Turn on number lock. The key looks like this. (Num Lock)
HOLD DOWN Alt the whole time when doing this next step.
While holding down Alt, type in 236 on this number pad. Not the one above the letters. Do this step rather quickly.
If you do it correctly, a small infinity sign should show up! Sorry for the lines
Have fun with it!