## Convert an integer or float to hex in Python :

In this tutorial, we will learn how to find out the *hex* value of an *integer* or a *float* in *python*.

*Hexadecimal* is a *base 16* number system. It uses the numbers *0 to 9* and then uses the letters *A to F* for representation. Numbers from *zero* to *nine* are represented by *‘0’ to ‘9’* like decimal.*‘A’ to ‘F’* are used to represent values from *ten* to *fifteen*.

To convert a *decimal* value to *hexadecimal*, we need to do a lot of calculations. But python provides us *two* inbuilt methods to find out the hexadecimal representation of an *integer* or for a *float* number.

In this blog post, we are not going to write the complete process for converting a number to *hexadecimal*. Instead, we will learn how to generate the *hexadecimal* value using the provided inbuilt methods.

## Using hex() method :

Method *hex()* is used to find out the hex value of an *integer*. It converts an *integer* number to a *lowercase hexadecimal* string.

The *hexadecimal* string is prefixed with *‘0x’*. One more thing to note is that we can even find out the *hexadecimal* value of a *negative* integer. The syntax of this method is like below :

`hex(x)`

It takes only *one* parameter. The parameter should be an *int* number or it should define a ** index()** method that returns an

*integer*value. It will convert the provided

*integer*value to

*hexadecimal*and returns the result in

*string*format.

Let me show you with one example of how it works :

As you can see that *0x* is prefixed with all strings indicating that the string is a hexadecimal representation. Now, let’s try to find out the hex value of a float using the same method :

That means we cannot use this method for floating numbers.

## Finding hex values for float :

As we have seen above, we cannot use *hex()* method to find the hex values for floating numbers. To find the *hexadecimal* value for *floating* numbers in python, we can use *float.hex()* method. This method takes one float as an input argument and returns the *hexadecimal* string as below.

### Example :

*‘float.hex()’* method is used to convert a *floating-point* number to its *hexadecimal* value.

Similarly, we can use *‘float.fromhex()’* method to convert a *hexadecimal* string value to *floating-point*.*‘hex()’* is an instance method but *‘fromhex()’* is a class method.

### ToDo :

We can use the above methods to create one simple *hexadecimal* converter in python. I am writing down the basic steps below.

- Create one python file. We will write our converter code in it.
- Ask the user to enter a
*number*. - Check if it is a valid number or not. If not, print one error message and exit.
- Check if the number is an
*integer*number or*floating-point*number. - If it is an integer, use
*‘hex(x)*’ and if it is a float, use*‘float.hex()’*to find out the hex value. - Print out the result to the user.

### Conclusion :

We have learned how to find the *hexadecimal* values of *integer* and *floating-point* numbers in python. Try to run the examples explained above and drop one comment below if you have any queries.

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