pyshop tasks

pyshop task 1

var matrixExample = [
   [ 1, 2, 3, 4 ],
   [ 4, 5, 6, 5 ],
   [ 7, 8, 9, 7 ],
   [ 7, 8, 9, 7 ]
 ];

function sumUpDiagonals(matrix) {
	var sumMain = 0;
  var sumSec = 0;
  for (var i = 0; matrix.length > i; i++){
  	sumMain += matrix[i][i];
    sumSec += matrix[i][matrix.length - i - 1];
  }
  return 'Сумма основной диагонали: ' + sumMain + '\nСумма вторичной диагонали: ' + sumSec;
};

console.log(sumUpDiagonals(matrixExample));