hex() function in Python

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:

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

0xff

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.

print(hex(ord('a')))  
print(float.hex(3.9)) 

0x61
0x1.f333333333333p+1

Explanation:

• ord('a') converts the character 'a' to its ASCII value, which is 97.
• hex(ord('a')) converts the ASCII value 97 into its hexadecimal equivalent 0x61.
• float.hex(3.9) converts the floating-point number 3.9 into its hexadecimal representation 0x1.f333333333333p+1.

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.

a = 0x22
b = 0x0A
# Bitwise AND and OR
print(hex(a & b)) 
print(hex(a | b))  

0x2
0x2a

Explanation:

• AND (a & b) and OR (a | b) operations on a (0x22) and b (0x0A), resulting in 0x02 (2 in decimal) and 0x2A (42 in decimal), respectively.
• hex(a & b) prints 0x2 and hex(a | b) prints 0x2a, converting the results into hexadecimal format.

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

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

0x3ade68b1

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.

print(hex(11.1))

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.

print(float.hex(11.1))

0x1.6333333333333p+3