# hex() function in Python

,The hex() function is one of the built-in functions in Python3, which is used to convert an integer number into its corresponding hexadecimal form. Hexadecimal is a base-16 numbering system commonly used in computer science and programming. In this article, we will explore the `hex()` function and its usage in converting decimal numbers to hexadecimal format in Python.

## Python Hex() Function Syntax

Syntax: hex(x)

Parameter: x – an integer number (int object)

## Python Hex() Function Example

The `hex()` function in Python is used to convert a decimal number to its corresponding hexadecimal representation. It takes an integer as an argument and returns a string representing the hexadecimal value.

## Python3

 `decimal_number ``=` `999` `hexadecimal_value ``=` `hex``(decimal_number)`   `print``(hexadecimal_value)`

Output

`0x3e7`

### Python Hex() Function For ASCII and Float Value

In Python, we can use the `hex()` function to convert ASCII characters to their corresponding hexadecimal representation. The `ord()` function is used to get the ASCII value of a character, and then `hex()` is applied to convert that value to hexadecimal.

## Python3

 `# Python3 program to illustrate` `# hex() function`   `print``(``"The hexadecimal form of 23 is "` `                            ``+` `hex``(``23``))` `                            `  `print``(``"The hexadecimal form of the "` `      ``"ascii value is 'a' is "` `+` `hex``(``ord``(``'a'``)))` `      `  `print``(``"The hexadecimal form of 3.9 is "` `                        ``+` `float``.``hex``(``3.9``))`

Output

`The hexadecimal form of 23 is 0x17The hexadecimal form of the ascii value os 'a' is 0x61The hexadecimal form of 3.9 is 0x1.f333333333333p+1`

### Python Hex() Function Perform Bitwise Operations

In Python we can use Hex() to perform bitwise operations. Bitwise operations are operations that manipulate individual bits within binary representations of data. Python provides various bitwise operations, such as AND, OR, XOR, NOT, etc.

## Python3

 `hex_num1 ``=` `0x22` `hex_num2 ``=` `0x0A`   `bitwise_and ``=` `hex_num1 & hex_num2` `bitwise_or ``=` `hex_num1 | hex_num2`   `print``(``hex``(bitwise_and)) ` `print``(``hex``(bitwise_or))`

Output

`0x20x2a`

### Python Hex() Function for Different Conversion

In Python, we can use Hex() for different conversions like hex to decimal, hex to binary, hex to string, and hex to octal. Here is an example:

## Python3

 `# TypeConversion from decimal with base 10` `# to hexadecimal form with base 16`   `# Taking input from user` `# an integer with base 10` `number ``=` `int``(``input``(``"Enter a number with base 10\n"``))`   `# The choices present to the user` `print``(``"a. Decimal to Hexadecimal "``)` `print``(``"b. Decimal to Octal"``)` `print``(``"c. Decimal to Binary"``)`   `# taking user input` `print``(``"Enter your choice :- "``)` `choice ``=` `input``()`   `# Running a variable choice` `# Hexadecimal form if choice` `# is set to 'a'` `if` `choice ``is` `'a'``:`   `    ``# lstrip helps remove "0x" from the left` `    ``# rstrip helps remove "L" from the right,` `    ``# L represents a long number` `    ``print``(``"Hexadecimal form of "` `+` `str``(number) ``+` `          ``" is "` `+` `hex``(number).lstrip(``"0x"``).rstrip(``"L"``))`   `if` `choice ``is` `'b'``:`   `    ``# Octal representation is done` `    ``# by adding a prefix "0o"` `    ``print``(``"Octal form of "` `+` `str``(number) ``+` `          ``" is "` `+` `oct``(number).lstrip(``"0o"``).rstrip(``"L"``))`   `if` `choice ``is` `'c'``:`   `    ``# Binary representation is done by` `    ``# the addition of prefix "0b"` `    ``print``(``"Binary form of "` `+` `str``(number) ``+` `          ``" is "``+``bin``(number).lstrip(``"0b"``).rstrip(``"L"``))`

Output

input variant a)

`Enter a number with base 10123a. Decimal to Hexadecimal b. Decimal to Octalc. Decimal to BinaryEnter your choice:- aHexadecimal form of 123 is 7b`

input variant b)

`Enter a number with base 10123456789a. Decimal to Hexadecimal b. Decimal to Octalc. Decimal to BinaryEnter your choice:- aHexadecimal form of 123456789 is 75bcd15`

### Python Hex() Function Demonstrate TypeError

Python demonstrates TypeError when floating point values are passed as parameters.

## Python3

 `# hex() accepts only integer values as parameters` `print``(``"The hexadecimal form of 11.1 is "` `                            ``+` `hex``(``11.1``))`   `'''` `# The hexadecimal conversion of floating  ` `# point integers can be done using the` `# function float.hex()` `print("The hexadecimal form of 11.1 is " ` `                    ``+ float.hex(11.1))` `# Output :` `# The hexadecimal form of 11.1 is 0x1.6333333333333p+3`   `# Similarly, float.hex() throws a TypeError` `# when integer values are passed in it. ` `'''`

Output

`Traceback (most recent call last):  File "/home/7e1ac7e34362fd690cdb72cf294502e1.py", line 2, in     print("The hexadecimal form of 11.1 is "+hex(11.1))TypeError: 'float' object cannot be interpreted as an integer`

Errors and Exceptions

`Typeerror :  Returns Typeerror when anything other than                                    integer type constants are passed as parameters.`

Applications
Hex() is used in all the standard conversions. For example conversion of hexadecimal to decimal, hexadecimal to octal, and hexadecimal to binary.

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