Can someone explain the error hexadecimal value 0x00 is an invalid character?

Answer 1

Way to go Jan.

Answer 2

Arpit Mittal
10 can actually represent a hexadecimal and binary number (and any other base above binary)
in hex it is 16, in binary it's 2. the important thing when writing and reading numbers is knowing which base you are talking about. to help, usually hex numbers are written with 0x in front.