Algorithm

Row_Column.js

function solution(arr1, arr2){
    var answer = [];
    for(var k = 0; k < arr1.length; k++){
        answer.push([]);
    }
    for(var i = 0; i < arr1.length; i++){
        for(var j = 0; j < arr1[i].length; j++){
            answer[i][j] = arr1[i][j] + arr2[i][j];
        }
    }
    return answer;
}