About Hex Decoder
Hexadecimal notation uses sixteen symbols to represent sixteen numerical values. Since, the decimal numbering system provides only ten digits (0 through 9), six additional symbols are used by hexadecimals A, B, C, D, E and F. Hexadecimals are widely used for denoting errors and in data transmission also.
Basics – Binary, ASCII and Decimal
Binary is a language of electronics basically, 0 and 1 are ON and OFF signal. Binary is a best way to store and process data with in electronics. We can also use decimal but like i said earlier ON and OFF signal, we need 10 more units. For example – in on and off, we need 2 unit only, first one is OFF (No volt) and second one is 0.5 volts (ON). But when we create ten units like (0.5 volts, 1 volt, 1.5 volt so on) then how much electricity it will consume, for now binary is a most efficient way.
We use 1-9 numbering system in our daily life, much familiar to us ten fingers, ten toes etc. We use decimal numbering system for notation purpose (With decimals you can easily get the position of any binary or text) as well as, you can also convert decimal to binary or binary to decimal through calculation.
ASCII character (ABC,123) take 8-bit, while other language character or sign take more space. Binary like 01100001 is reserved for certain character, as you know computer was developed by US. So its very obvious they reserve front binary set for english characters.
Country like china and many more developed their own parameters, it mean certain binary like 01100001 is reserved for one Chinese character while the same binary have different meaning in US. These parameter can be used with in one or two countries not globally. So to avoid incompatibilities in data handling, we use global parameter known as UTF-8. It contain almost all human known characters and every binary slot is fixed for certain character, that’s why UTF-8 hold 70-80% market share.
Computers do not actually work in hex, it always works on binary, then why we use hexadecimal numbers, two reason behind this.
It gives a more human-friendly representation, which is far more simpler then representing something in binary numbers. For small binaries we can use decimals, but big ones have quite large decimals you can see it in a given example. Hex take less space and having human-friendly output, that’s why used for denoting errors.
Binary: 0010 1010 1111 0011
Second and the main, also used for encoding because some portal works on (ASCII only) scheme, so its difficult to work with (non-ASCII) characters because they take much space (More than 8 bits), at this time schemes like hex or base64 take place, basically they convert all non-ASCII character into ASCII ones (Hex ASCII string), now data can be transferred through (ASCII only portal) and on the receiver side hex gets decoded, now receiver can read it.
What is hexadecimal
In mathematics and computing, hexadecimal is a base 16 (hexa) number system, which means that it contains 16 unique symbols to represent data: the numbers from 0 to 9 and the letters from A to F.
This system is useful because it can represent each byte (8 bits) with two consecutive hexadecimal digits. This allows people to read hexadecimal numbers more easily than binary numbers.
This technique allows us to count hexadecimal numbers using our fingers and phalanges, as can be seen in the image. It allows us to count up to FF16 (255 in decimal).
Hexadecimal numbers are widely used by programmers and designers of computer systems. There are several notations to represent hexadecimal constants in programming languages. The prefix “0x” is the most widespread due to its use in Unix and C, it indicates that there will be a hexadecimal number below. Other authors prefer to use suffixes to represent hexadecimal values. For example, the hexadecimal number can be written like this 0x2AF3 or, in the case that a suffix is used, the same number as 2AF316 (where the final 16 indicates that it is a hexadecimal) or 2AF3hex is also used a lot.