Python hex() Function

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The Python hex() function is used to convert an integer to a hexadecimal (base-16) format.

Hexadecimal is a numeral system that uses 16 digits, where the first ten are the same as the decimal system (0-9), and the next six are represented by the letters A to F (or a-f), corresponding to the values 10 to 15. When you use the hex() function in Python, it converts a decimal number into its hexadecimal representation, and the result is a string that starts with "0x" followed by the hexadecimal digits.

Syntax

Following is the syntax of python hex() function −

hex(x)

Parameters

This function accepts an integer value as its parameter.

Return Value

This function returns a string representing the hexadecimal value of the given integer.

Example

Following is an example of the Python hex() function. Here, we are converting the integer "111" to its hexadecimal representation −

integer_number = 111
hexadecimal_number = hex(integer_number)
print('The hexadecimal value obtained is:', hexadecimal_number)

Output

Following is the output of the above code −

The hexadecimal value obtained is: 0x6f

Example

Here, we are using the hex() function to convert a binary and an octal value to their corresponding hexadecimal representation −

binary_number = 0b1010
octal_number = 0o77
binary_to_hexadecimal = hex(binary_number)
octal_to_hexadecimal = hex(octal_number)
print('The hexadecimal value of binary number is:', binary_to_hexadecimal)
print('The hexadecimal value of octal number is:', octal_to_hexadecimal)

Output

The output obtained is as follows −

The hexadecimal value of binary number is: 0xa
The hexadecimal value of octal number is: 0x3f

Example

Now, we are removing the "0x" prefix from the output when converting integer value "2108" to its hexadecimal representation using the hex() function −

integer_number = 2108
hexadecimal_noprefix = hex(integer_number)[2:]
print('The hexadecimal value of the integer without prefix is:', hexadecimal_noprefix)

Output

The result produced is as follows −

The hexadecimal value of the integer without prefix is: 83c

Example

If we pass a non-integer value to the hex() function, it will raise a TypeError.

Here we will demonstrate the TypeError by passing a floating point value "11.21" to the hex() function −

# Example to demonstrate TypeError
floating_number = 11.21
hexadecimal_number = hex(floating_number)
print('The hexadecimal value of the floating number is:', hexadecimal_number)

Output

We can see in the output that we get a TypeError because we have passed a floating point value to the hex() function −

Traceback (most recent call last):
  File "C:\Users\Lenovo\Desktop\untitled.py", line 3, in <module>
    hexadecimal_number = hex(floating_number)
TypeError: 'float' object cannot be interpreted as an integer

Example

Since hexadecimal represents numbers in base-16 notation, we can handle the TypeError by using the float.hex() function instead of the regular hex() function.

# Example without TypeError
floating_number = 11.21
hexadecimal_number = float.hex(floating_number)
print('The hexadecimal value of the floating number is:', hexadecimal_number)

Output

The output of the code is as follows −

The hexadecimal value of the floating number is: 0x1.66b851eb851ecp+3