![]() A byte is eight bits often represented by 0000 0000. In computing, a bit is a single on/off switch often represented by a 0 or a 1. If we have a hex number such as DE, we can calculate its value this way: This means that 0x45 in hex can be evaluated such as: We can evaluate it similarly to a decimal number except the second column represents 16s and not 10s. This means that when we see a hex representation of a number such as: This means that the hex system has the following values. The computer industry has decided to use the letters A-F to represent these additional values. Unfortunately, we only have 10 to work with (0-9), so we need to add six more. Like the decimal or Base10 system, the hex system has to have 16 digits to cover all the possibilities. The hex system is a base16 numbering system. So, the first four hex columns have values like this:Įach is 16 times greater than the column to its right. The hex system works similarly, but each column is 16 times larger than the previous column. Represents (starting on the right and moving left):Įach place holder is 10 times larger than the previous one. In that system, we have 10 digits (0-9) and each column in that system represents a value 10 times greater than the one to the right of it. ![]() One of the best ways to come to understand the Base16 or hexadecimal system is to go back to the basics of a numbering system you are very familiar with, the Base10, or decimal system. ![]()
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