Hexadecimal Number System

Base-16 · Hex Digits · Color Codes

1:00

How base-16 hex notation works, why it is the perfect shorthand for binary, and where you will encounter it in real programs and hardware.

By the end, you can

List the sixteen hex digits and give the decimal value of each letter digit (A–F).
Explain why one hex digit corresponds to exactly four binary bits.
Convert a hex number to decimal by multiplying each digit by its power-of-16 place value.
Convert a decimal value to its hex representation for single- and two-digit results.
Decode a web color code such as #FF0000 into its red, green, and blue channel values.
Recognize the `0x` prefix and avoid confusing `0x10` (16) with decimal 10.
Describe what happens when counting past `0xFF` in a single byte (wrap to 0x00 with carry).

Up next in Binary & Data Representation