To write the 02e005f002e0020002900280020002e005f002e00290040007400770069006e0073 Sad Symbol Smiley Face symbol on keyboard using ALT codes; ALT+3.0354734101423E+83, just hold down the ALT key while typing the alt key code 3.0354734101423E+83. 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.