#!/usr/bin/env zsh
# YES_ZSH
# YES_BASH
# YES_DASH

# though technically compatible with other shells,
# extra functionality is through zsh's extended arithmetic functions.

hex() { ### @-
    ### perform arithmetic using the shell and display the result as
    ### an unsigned 32-bit integer in hexadecimal.
    ### see also [`arith`](#arith) and [`bin`](#bin).
    ###
    ### ```
    ### $ hex 0x221EA8-0x212020
    ### 0000FE88
    ### ```
    printf "%08X\n" "$(($@))"
}

[ "${SOURCING:-0}" -gt 0 ] || hex "$@"