hex is:exact

hex = base 16
Render an integer using hexadecimal notation. (No leading 0x is added.) Has a specialized implementation.
Render an integer using hexadecimal notation. (No leading "0x" is added.)
Show a number in hex, without prefix, or types.
Convert strings into hexadecimal and back. Convert strings into hexadecimal and back.
Hexadecimal formatting with maximum-bit length
Common Parsers Parse at least one hex digit.