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How to convert a number to its hexadecimal representation in Kotlin

How to convert a number to its hexadecimal representation in Kotlin.

Here's a step-by-step tutorial on how to convert a number to its hexadecimal representation in Kotlin:

Step 1: Define the Number​

First, you need to define the number that you want to convert to hexadecimal. It can be an integer or a long value. For this tutorial, let's assume we have the number 255 that needs to be converted to hexadecimal.

Step 2: Use the toHexString() Function​

In Kotlin, you can use the built-in toHexString() function to convert a number to its hexadecimal representation. This function is available for both Integer and Long data types.

Here's an example of how to use the toHexString() function to convert the number 255 to hexadecimal:

val number = 255
val hexadecimal = Integer.toHexString(number)

In the above example, the toHexString() function takes the number as an argument and returns its hexadecimal representation. The result is stored in the hexadecimal variable.

Step 3: Display the Hexadecimal Value​

To see the hexadecimal representation of the number, you can print the value of the hexadecimal variable using the println() function or any other method of your choice.

Here's an example of how to display the hexadecimal value:

println("Hexadecimal: $hexadecimal")

This will output the following:

Hexadecimal: ff

In this example, the hexadecimal representation of the number 255 is "ff".

Step 4: Handling Negative Numbers​

If you need to convert a negative number to its hexadecimal representation, you can use the toUnsignedString() function instead of toHexString(). This function converts the number to an unsigned hexadecimal representation.

Here's an example of how to convert a negative number to its hexadecimal representation:

val negativeNumber = -255
val unsignedHexadecimal = Integer.toUnsignedString(negativeNumber, 16)

In the above example, the toUnsignedString() function takes the negativeNumber and the radix (16 for hexadecimal) as arguments and returns the unsigned hexadecimal representation. The result is stored in the unsignedHexadecimal variable.

Step 5: Display the Unsigned Hexadecimal Value​

To see the unsigned hexadecimal representation of the negative number, you can print the value of the unsignedHexadecimal variable using the println() function or any other method of your choice.

Here's an example of how to display the unsigned hexadecimal value:

println("Unsigned Hexadecimal: $unsignedHexadecimal")

This will output the following:

Unsigned Hexadecimal: ffffff01

In this example, the unsigned hexadecimal representation of the negative number -255 is "ffffff01".

That's it! You have successfully converted a number to its hexadecimal representation in Kotlin using the toHexString() and toUnsignedString() functions.