#!/bin/zsh
galiases[=]='()' # declare the '=' global alias
aliases[return]=echo # additional curse
# consider the following:
greet = return "Hi! $1 :)"
greet Lea # -> Hi! Lea :) 
# also:
square = {
    return $(( $1 * $1 ))
}
square 2      # -> 4
square 46.228 # -> 2137.027984