How for loop works?

Question

I was wondering if anyone can somebody please explain to me how this loop works?.

for (var x = 0; x < numbers.length; x++) {
  if (numbers[x] > largest)
    largest = numbers[x];
  }
}

Any JavaScript tutorial or book should explain very early how loops work. What part exactly do you not understand in this particular loop? — JJJ, Jun 10 '17 at 08:28
this is a good start https://www.w3schools.com/js/js_loop_for.asp — Tik, Jun 10 '17 at 08:29

score 0 · Accepted Answer · edited Sep 30 '17 at 12:29

Here is an explanation of everything happening in the for loop

//                  keeps the for loop going while x is less than numbers.length which is the length of nmbers
// sets x to 0 initialy |          increases x by +1 each time it restarts to begin the loop
//       V              V            V
for (var x = 0; x < numbers.length; x++) {
    //   Executes code if numbers[x] is greater than largest
    //            V
    if (numbers[x] > largest){
        //   sets largest to numbers[x] if numbers[x] is greater than largest
        //      V
        largest = numbers[x];
    }
}

score 0 · Answer 2 · answered Jun 10 '17 at 08:36

0

I think you are trying to get the largest number from the array, so here is how I would do it:

// https://stackoverflow.com/questions/1669190/javascript-min-max-array-values

var array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

Array.prototype.max = function() {
  return Math.max.apply(null, this);
};

Array.prototype.min = function() {
  return Math.min.apply(null, this);
};

document.write(array.max());

answered Jun 10 '17 at 08:36

KingCoder11

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2

Doesn't answer the OP. Just provides a more, expert answer, when he is just learning to code javascript. – ModerateJavaScriptDev Jun 10 '17 at 08:40

How for loop works?

2 Answers2