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hex() function in Python - GeeksforGeeks

hex() function in Python

Last Updated : 11 Jul, 2025

hex() function in Python is used to convert an integer to its hexadecimal equivalent. It takes an integer as input and returns a string representing the number in hexadecimal format, starting with "0x" to indicate that it's in base-16. Example:

Python
a = 255
res = hex(a)
print(res)

Explanation: hex() function takes that number and converts it into its hexadecimal representation, which is 0xff. The result is stored in res.

Syntax of hex()

hex(x)

Parameter: x is an integer number (of type int).

Returns: A string representing the hexadecimal form of the integer. The string is prefixed with 0x, indicating that it is in base-16.

Examples of hex()

Example 1: In this example, we convert an ASCII character and a floating-point number to their corresponding hexadecimal values.

Python
print(hex(ord('a')))  

print(float.hex(3.9)) 

Output
0x61
0x1.f333333333333p+1

Explanation:

Example 2: In this example, we perform bitwise AND and bitwise OR operations on two hexadecimal numbers a and b. The results are then converted to hexadecimal format.

Python
a = 0x22
b = 0x0A

# Bitwise AND and OR
print(hex(a & b)) 
print(hex(a | b))  

Explanation:

Example 3: In this example, we convert a large integer to its corresponding hexadecimal value using the hex() function.

Python
a = 987654321
res = hex(a)
print(res)

Explanation: hex(a) convert 987654321 to its hexadecimal representation.

Error and Exceptions

hex() function raises a TypeError if a non-integer (e.g., a float or string) is passed as an argument.

Python

Output

Hangup (SIGHUP)
Traceback (most recent call last):
File "/home/guest/sandbox/Solution.py", line 1, in <module>
print(hex(11.1))
~~~^^^^^^
TypeError: 'float' object cannot be interpreted as an integer

To convert a float to hexadecimal, use the float.hex() method instead.

Python
Output
0x1.6333333333333p+3


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