The infinity symbol appears in certain types of mathematics and sciences and represents an number that has no end. If you create documents that contain calculus or physics equations, you might need to type the symbol. While the keyboard does not include specialized symbols such as infinity, you can use an "ALT code" to enter the infinity symbol and many other symbols. This allows you to use the "ALT" key and a number combination to type special characters.
Open the program or document in which you wish to type the symbol.
Press the "Num Lock" key on the keyboard to activate the keyboard's number pad. Move the cursor with the mouse to the location in the document or program where you want to type the symbol.
Press and hold the "ALT" key and type "236" on the number pad to type the infinity symbol.