We've got to put down the three-dimensional masses 3x3 (and find the average of all elements)

[Alberto]

It's a code like this, it's kind of ravishing, but it's empty in the sun. Help me figure out what's wrong.

let arr = [
                [1, 2, 3],
                [4, 5, 6],
                [7, 8, 9],
            ];
        let arr2 = [
            [1, 2, 3],
            [4, 5, 6],
            [7, 8, 9],
        ];

function Massives(arr, arr2){
            function ArrSum(arr, arr2){

                let ArrSum = [
                    [],
                    [],
                    [],
                ];

                for(i=0; i<arr.lenght; i++){
                    let PodArr = arr[i];
                    let PodArr2 = arr2[i];
                    for(k=0; k < PodArr.lenght; k++){
                        let sum = PodArr[k];
                        let sum2 = PodArr2[k];
                        let endSum = sum + sum2;
                        ArrSum[i].push(endSum);
                        
                    }
                }
                return ArrSum;

            };



            function ArrSub(arr, arr2){

            let ArrSub = [
                [],
                [],
                [],
            ];
                for(i=0; i<arr.lenght; i++){
                    let PodArr = arr[i];
                    let PodArr2 = arr2[i];
                    for(k=0; k < PodArr.lenght; k++){
                        let sub = PodArr[k];
                        let sub2 = PodArr2[k];
                        let endSub = sub - sub2;
                        ArrSub[i].push(endSub);
                        
                    }
                }
                return ArrSub;

            };


            function ArrMid(arr, arr2){
                for(i=0; i<arr.lenght; i++){
                    let PodArr = arr[i];
                    let PodArr2 = arr2[i];
                    for(k=0; k < PodArr.lenght; k++){
                        let mid = PodArr[k];
                        let mid2 = PodArr2[k];
                        var EMid =+ mid + mid2;
                        let endMid = EMid/(PodArr.lenght * arr.lenght);
                        return endMid;
                    }
                }
            };

            
            console.log(ArrSum(arr, arr2));
            console.log(ArrSub(arr, arr2));
            console.log(ArrMid(arr, arr2));
        

            
        }

        console.log(Massives(arr, arr2));</code></pre></div></div></p>

[Kadir]

Careful.

lenght - majority