Input zone

   It's the zone in the upper part of the Main window.
   You can enter here an expression, this one will be evaluated when you'll hit ENTER
   or when youu'll clic on EXE button.

   To enter a number in a different base than the active one, you
   must prefix it by one of the following:

   - 0b for a binary number
   - 0o for an octal number
   - 0d or nothing for a decimal number
   - 0x or 0h for an hexadecimal number

   The result will be in the active base when you are in programmers Calc mode.