Let's take the example further, and convert each hexadecimal digit to its decimal equivalent and then add them: (16 2 x 1) + (16 0 x 15) + (16 0 x 4) = (256 + 240 + 4) = 500. Hex and binary in action.

While the decimal numbering system allows any digit in a number to have any of ten values (0-9), digits in hexadecimal numbers can have 16 (0-F), digits in octal numbers only eight (0-7) and ...

In hex, numbers between zero and nine are represented as they are in decimal, with number ten using the letter A, then 11 as B and so on up to F, which is 15. The 12 is therefore C in hexadecimal.

Zoned decimal: ZDB: Translates EBCDIC blank (hex 40) to EBCDIC zero (hex F0), then corresponds to the informat as zoned decimal: none: Zoned decimal: ZDV: Non-IBM zoned decimal representation: S370FPD ...

You will see Hex (Hexadecimal), Dec (Decimal), Oct (Octal) and Bin (Binary) radio buttons. These are used for converting numbers between these numbering systems.

ASCII Decimal, ASCII Hex, or Unicodes? Notice that all of the Alt codes in the charts above are represented by numbers; for example, the White Queen is Alt+ 9813.

Useful (particularly since expr and $(( )) can't work with floats and decimal values), but where this gets really interesting is with those input and output numeric bases. Let's say I want to confirm ...

When decimal numbers are within the range of 0 to 9, their binary and BCD representations are identical, ... This shifted number is then masked or "ANDed" with the hex value of I.