Hexadecimal Notation

Hexadecimal number is a notation system for numbers.

In hexadecimal numbering system, we represent numbers using 16 symbols. Each digit is any 0 to 9 and A to F (sometimes lowercase).

Here's examples:

Hexadecimal is used often in computing, because each hexadecimal digit is equivalent to 4 Binary digits, so is compact and more readable.

• 1 hexadecimal digit has the same number of possible values as 4 bits.
• 2 hexadecimal digit has the same number of possible values as 8 bits.
• 3 hexadecimal digit has the same number of possible values as 12 bits.
• 4 hexadecimal digit has the same number of possible values as 16 bits.

So, 4 bits can be written as 1 hexadecimal. 8 bits can be written as 2 hexadecimal, etc.

Possible Size in Hexadecimal Number

If a hexadecimal number has n digits, it has 16^n possible values.