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22 lines
764 B
22 lines
764 B
2 years ago
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# Increment
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Cryptographic algorithms use a `binary` representation of variables internally (`Buffer` in nodejs). `Hexadecimal` representation is used to facilitate human reading. To get more familiar with the hexadecimal form, we will do a simple operation.
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### Instructions
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Create a function `increment` that takes as argument a number written in hexadecimal form and returns the same number incremented by one.
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### Usage
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```js
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increment("03"); // expected : <Buffer 04>
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increment("a0"); // expected : <Buffer a1>
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increment("ff"); // expected : <Buffer 01 00>
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increment("d537"); // expected : <Buffer d5 38>
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```
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### Notions
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- [Node.js buffer](https://nodejs.org/api/buffer.html)
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- [Wikipedia: Hexadecimal number](https://en.wikipedia.org/wiki/Hexadecimal)
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