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Python 3 reference · Built-in Functions

Python hex() Function

Convert an integer to a lowercase hexadecimal string prefixed with 0x, such as hex(255) giving '0xff'.

Python 3 Since 3.0

Syntax

hex(x)

Parameters

ParameterDescription
x An integer.

Return value

A string such as '0xff'.

Examples

To hex and backTry it yourself
print(hex(255), hex(16), hex(-42))
print(int("ff", 16), int("0xff", 0))

Output

0xff 0x10 -0x2a
255 255
A colour code without the 0x prefixTry it yourself
r, g, b = 15, 118, 110
print(f"#{r:02x}{g:02x}{b:02x}")

Output

#0f766e

Version history

VersionChange
Python 3.0Added
  • bin() · Convert an integer to a binary string prefixed with 0b, such as bin(5) giving '0b101'. Negative numbers get a minus sign.
  • oct() · Convert an integer to an octal string prefixed with 0o, such as oct(8) giving '0o10'. Often used for file permissions.
  • int() · Convert a number or string to an integer. Floats are truncated toward zero, and strings can be in any base from 2 to 36.
  • format() · Format a single value with a format spec, such as format(3.14159, '.2f') giving '3.14'. The same mini-language as f-strings.
  • Python Numbers · tutorial