∅ Empty Set Symbol Circle Symbol Smiley Face U+2205

How to Write the Empty Set Symbol ∅ on Keyboard?

To write the Empty Set symbol ∅ on keyboard using ALT codes; ALT+8709, just hold down the ALT key while typing the alt key code 8709. You have to use the numeric keypad of your keyboard. If you don not have numeric keypad, hold down the Fn and ALT keys while typing the alt code number.