Programming ConceptsLesson 24Free preview

Hexadecimal Numbers

This lesson is part of Intro to Programming · All levels

Summary

This lesson discusses hexadecimal, a 16 number system with digits 0-9 and letters A through F. Hex is often used to represent web colors, memory addresses, and dense binary data because each hex digit represents exactly 4 bits. The conversion is easy because it's directly related to binaries. (#FF5733)

Key points

Hexadecimal based on 16 with digits 0-9 and A-F
One hex digit is 4 bits, so 2 digits is 1 byte.
Web color is often written in hex such as #FF5733
Hex to binary is enough to replace each digit with its 4 bits.

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