What is a hex?

A hex, short for hexadecimal, is a base-16 number system used in computing and digital systems. It uses 16 distinct symbols (0-9 and A-F) to represent values from 0 to 15.

In binary code, which is made up of only 0's and 1's, a single hexadecimal digit can represent four binary digits or bits. For example, the binary number 1101 can be represented as the hexadecimal digit D.

Hexadecimal notation is commonly used in computer programming to represent memory addresses, color codes, and other numerical values. It is also used in website development for web colors and CSS styles.

Converting between hexadecimal and decimal (base-10) or binary (base-2) requires a conversion table or calculator.