How to determine the number of animals at the specified coordinates

[asdf]

I used a translator.

The number of cattle will continue to be zero when coded below.
What should I do?

%{;;s}% is #

options:
    prefix: &eAnimal&f>
   
command /animal [<text>]:
    permission: lom.op
    trigger:
        if arg-1 is not set:
            send "{@prefix} /animal wand &c-> &fGive a wand."
            send "{@prefix} /animal check &c-> &fcheck number of animal"
        else if arg-1 is "wand":
            set {_wand} to feather named "&cAnimal Check Wand" with lore "Left click: select pos %{;;s}%1||Right click: select pos %{;;s}%2"
           
            give 1 of {_wand} to player
           
            send "{@prefix} Left click: select pos %{;;s}%1"
            send "{@prefix} Right click: select pos %{;;s}%2"
        else if arg-1 is "check":
            if {animalcheck.pos1} is not set:
                send "{@prefix} please select pos %{;;s}%1"
            else if {animalcheck.pos2} is not set:
                send "{@prefix} please select pos %{;;s}%2"
            else:
                set {_animals} to 0
                loop all entities:
                    set {_loc} to loop-entity's location

                    set {_animals} to number of cows in {animalcheck.pos1} and {animalcheck.pos2}
                send "Number of animals : %{_animals}%"
               
                delete {animalcheck.pos1}
                delete {animalcheck.pos2}
               
on leftclick:
    if player has permission "lom.op":
        set {_wand} to feather named "&cAnimal Check Wand" with lore "Left click: select pos %{;;s}%1||Right click: select pos %{;;s}%2"
        if player's tool is {_wand}:
            cancel event
            set {_click} to event-location
            if {_click} is not set:
                stop
            else:
                cancel event
                set {animalcheck.pos1} to event-location
                send "{@prefix} First position set to %event-location%"
               
on rightclick:
    if player has permission "lom.op":
        set {_wand} to feather named "&cAnimal Check Wand" with lore "Left click: select pos %{;;s}%1||Right click: select pos %{;;s}%2"
        if player's tool is {_wand}:
            cancel event
            set {_click} to event-location
            if {_click} is not set:
                stop
            else:
                cancel event
                set {animalcheck.pos2} to event-location
                send "{@prefix} Second position set to %event-location%"

 

[Mr_Simba]

You don't need to use a variable like {;;s} to insert #, you can just put in two in a row, for example you can do "##1" to show #1.

You'll need a somewhat more involved solution for this, I don't think there's a simple effect to count the number of entities in a square box. You'll need to compare their coordinates individually (X, Y, and Z) to see if they're between the coordinates of your selected box.