The hexadecimal number system, also known by base-16 or sometimes just hex. It is a number system that uses 16 unique symbols to represent a particular value. Those symbols are 0-9 and A-F. The word hexadecimal is a combination of hexa (meaning 6) and decimal (10). Binary is base-2, octal is base-8, and decimal is of course base-10.
The number system that we use in day-to-day life is called the decimal, or , system and uses the 10 symbols from 0 through 9 to represent a value.
Hexadecimal esteems are once in a while composed with the prefix “0x” (0x2F7) or with a subscript (2F716), however it doesn’t change the esteem. In both of these cases, you could keep or drop the prefix or subscript and the decimal esteem would stay 759.
Suggested Read: Hex to Decimal converter
How to Count in Hexadecimal
Counting in hexadecimal format is easy so long as you remember that there are 16 characters that make up each set of numbers.
For instance: you can convert hex to decimal very easily once you’ll be familiar with Hexadecimal Table.
In decimal format, we all know that we count like this:
0,1,2,3,4,5,6,7,8,9,10,11,12,13,… adding a 1 before beginning the set of 10 numbers over again (i.e. the number 10).
In hexadecimal format however, we count like this, including all 16 numbers:
0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,10,11,12,13… again, adding a 1 before beginning the 16 number set over again.
Here are a few examples of some tricky hexadecimal “transitions” that you might find helpful:
…17, 18, 19, 1A, 1B…
…1E, 1F, 20, 21, 22…
…FD, FE, FF, 100, 101, 102…
Importance of Hexadecimal Numbers in Computer Science
Hexadecimal has a nearer visual mapping to the different bytes used to store a number than decimal does.
For instance, you can tell from the hexadecimal number 0x12345678 that the most huge byte will hold 0x12 and the minimum noteworthy byte will hold 0x78. What might as well be called that, 305419896, reveals to you nothing.
From a verifiable point of view, it merits specifying that octal was all the more normally utilized when working with certain more seasoned PCs that utilized an alternate number of bits per word than current 16/32-bit PCs.