It depends where; in Microsoft Word for example you can give the command "Insert | Symbol". There is an infinity sign among the variety of symbols there. For other programs, in the case of Microsoft Windows, you can use the CharMap utility to search for characters. From there, you can copy and paste symbols to different programs. Other operating systems should have some equivalent utility.
Infinity sign on iPhone
There is an app called the "character viewer"; see if you can find an infinity sign there.
[infinty sign]<x<[infinity sign]
The infinity sign ∞ is sometimes called the lemniscate.
The sign for infinity is ∞
The infinity symbol is ∞, if this is what you are asking.
∞ -- Copy and paste this character if you want to use an infinity symbol on your iPhone. There is no infinity symbol available on the standard iPhone keyboard.
The infinity sign is called the lemniscate.
Alt+236=∞ (but it has to be the number pad on the side for 236 or it won't work)
I don't have personal experience with Instagram. But if you access it via a website, you might try using the Charmap application in Windows (or the equivalent in some other operating system), find the infinity sign, copy it and then paste it to the website.
he invented the infinity sign
No it does not.