const arr = [1,2,3,4,5,6,7,8,9,10];

for (var i = 0; i < arr.length; i++){

    var number = arr[i];

}

const arr = [1,2,3,4,5,6,7,8,9,10];

for (var n of arr){

  var number = n;

}

const arr = [1,2,3,4,5,6,7,8,9,10];

for (var i in arr){

    var number = arr[i];

}

const arr = [1,2,3,4,5,6,7,8,9,10];

arr.forEach(n => {

  var number = n;

});

const arr = [1,2,3,4,5,6,7,8,9,10];

for (var i = 0, n = arr.length; i < n; i++){

    var number = arr[i];

}

const arr = [1,2,3,4,5,6,7,8,9,10];

while(arr.length) {

    var number = arr.shift();

}

const arr = [1,2,3,4,5,6,7,8,9,10];

var i = 0;

var n = arr.length;

while(i < n) {

    var number = arr[i];

    ++i;

}

const arr = [1,2,3,4,5,6,7,8,9,10];

var len = arr.length;

while (len--) {

    var number = arr[len];

}

const arr = [1,2,3,4,5,6,7,8,9,10];

for (var i = arr.length; i >= 0; --i){

    var number = arr[i];

}