4 ‖ number (digit) four

integer, natural,
positive, counting number, even

powers

square

2²

0. bin code

   00110100

1. url code

   %34

2. html codes

   • 4
   • 4

3. css codes

   • \0034
   • \34

4. js codes

   • \u0034
   • \u{34}
   • \x34