The number 33 in hexadecimals can be represented as 21 since the 2 in the second place represents 16 twice and the 1 in the first place represents just that: 1. In the same way that you represent the number 15 in decimals, you could represent it in hexadecimals using only F. ![]() In hexadecimal numbers A is 10, B is 11, C is 12, D is 13, E is 14 and F is 15. The reason why you see A, B, C, D, E and F being used in hexadecimal numbers is that we have agreed that these would be the symbols we would use to represent numbers bigger than 10 using a single character. Once we reach 16 in any of the places of our number representation, we will carry one over to the next place. Hexadecimal numbers, for example, are nothing but numbers represented using 16 as a base. In the same way that the system I described above uses ten as its base, we could have chosen to use any number as a base. The number 22 is nothing but 10 units repeated twice plus 2 units. Once we reach 10 in any of the places of our number representation, we carry one over to the next place. This means that we can count up to 10 - 1 using a single place. We humans naturally use the decimal system as a way of representing numbers. There are many ways of representing the same numbers. They are also very useful, for example, when building emulators, an exercise I’d definitely recommend.Įven though I will use JavaScript throughout the whole article, these are the absolute essentials for working with bit manipulation and will definitely be useful in whatever language you end up using. This post aims to demystify bitwise operations in JavaScript, as they can be useful for a myriad of applications. ![]() Lucas Fernandes da Costa at London, United Kingdom
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