`hex()` Function in Python [ English ]

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1. Introduction

The hex() function in Python is a built-in function used to convert an integer number into its hexadecimal representation. The hexadecimal number is returned as a string prefixed with 0x, which indicates that the number is in base-16 (hexadecimal system).

The hexadecimal number system uses 16 symbols:

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F

It is widely used in computer programming, memory addresses, and color codes in web development.

2. Syntax

hex(number)

Parameter

• number An integer value that needs to be converted into hexadecimal format.

3. Return Value

• Returns a string representing the hexadecimal equivalent of the integer.
• The result starts with the prefix 0x, which indicates hexadecimal format.

4. Basic Example

print(hex(10))

Output

0xa

Explanation

• The decimal number 10 is converted into hexadecimal.
• In hexadecimal, 10 = A.
• Python displays it as 0xa.

5. Example with a Larger Number

print(hex(255))

Output

0xff

Explanation

• The decimal number 255 is represented as FF in hexadecimal.

6. Removing the 0x Prefix

Sometimes we need only the hexadecimal digits.

num = 255
hex_value = hex(num)

print(hex_value[2:])

Output

ff

Explanation

• hex_value[2:] removes the first two characters (0x).

7. Example with Negative Numbers

print(hex(-20))

Output

-0x14

Explanation

• Python shows the negative sign before the hexadecimal value.

8. Practical Example

number = 100

hex_value = hex(number)

print("Decimal:", number)
print("Hexadecimal:", hex_value)

Output

Decimal: 100
Hexadecimal: 0x64

Explanation

• The decimal number 100 is equal to 64 in hexadecimal.

9. Summary

• hex() is a built-in Python function used to convert an integer into hexadecimal format.
• The result is returned as a string.
• The output begins with the prefix 0x, indicating hexadecimal representation.
• It works only with integer values.
• It is commonly used in memory addressing, color codes, and low-level programming.