// JS (ES6)
var arr = [
  [1, 2, 3, 4],
  [5, 6, 7, 8],
  [9, 10, 11, 12],
  [13, 14, 15, 16]
];


for(i = 0; i < arr.length; i++) {
  for(j = 0; j < arr[i].length; j++) {
    var a = i+1
    var b = j+1
    var c = arr[i][j]
    var str = `In row ${a} and the column ${b} the matrix holds a ${c}`
    console.log(str)
  }
}