What is a hexadecimal please.?

Question

What is a hexadecimal please.?

Answer 1

It is a number expressed in base 16 format

Ordinary numbers are in base 10 format.  That means there 10 unique symbols involved, representing the first 10 counting integers from 0 to 9, and all base 10 numbers are combinations of those 10 symbols.

In base 16 you have 16 symbols, representing the first 16 counting integers, from 0 to F.  The letters A, B, C, D, E, and F are used to represent the 6 integer quantities following 9.  And all base 16, or hexadecimal, numbers are combinations of those 16 symbols.  

Aside from that, base 16, or hexadecimal, numbers work in exactly the same way as base 10 numbers.  And you can construct a number system based on any number of unique symbols you want.  Except zero I guess.  

It seems strange to most people when they first encounter this kind of baloney, because often they've never thought about why there are 10 symbols in their number system, instead of 8 or 27, say, or what it would be like if the number of symbols was something other than 10.

Answer 2

hexadecimal is a number system like decimal. In decimal (base-10 number system) we use the digits 0-9 to form our numbers. In hexadecimal (base 16 number system) we use 0-9 and then A-Z to form our numbers. For example: Decimal 10 would be Hex A, Decimal 15 would be Hex F and decimal 16 would be Hex 10 and decimal 26 would be Hex 1A.

This system is used in internal calculations by the computer's processor and memory management.

Here is a chart for the conversion of some hex values to decimal and also binary

http://www.dewassoc.com/support/msdos/de...

Answer 3

In mathematics and computer science, hexadecimal (also base-16, hexa, or hex) is a numeral system with a radix, or base, of 16. It uses sixteen distinct symbols, most often the symbols 0–9 to represent values zero to nine, and A, B, C, D, E, F (or a through f) to represent values ten to fifteen.

Its primary use is as a human friendly representation of binary coded values, so it is often used in digital electronics and computer engineering. Since each hexadecimal digit represents four binary digits (bits)—also called a nibble—it is a compact and easily translated shorthand to express values in base two.

find more on http://en.wikipedia.org/wiki/Hexadecimal...

Answer 4

Hexadecimal is a number system with base 16, not with base 10, like we normally count.

In our normal decimal system, the numbers in one digit go 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. There are 10 different numbers.

In hexadecimal, there are 16 different numbers for a digit; the additional six digits are usually shown as A-F:

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F.

That means that the second digit from the right aren't "tens" anymore, they are "sixteens", and the third digit aren't "hundreds", they are "two-hundred fifty-sixes".

In hexadecimal, the number 123 is not 1*100+2*10+3 = 123, it is 1*256+2*16+3 = 291.

Answer 5

go to this website http://en.wikipedia.org/wiki/Hexadecimal