00 Votes

JavaScript: Get Array Length

Question by PC Control | 2014-05-22 at 11:12

Currently, I am trying to determine the length of an array in JavaScript.

Unfortunately, neither length(arr) nor count(arr) are working for me.

Can someone help me how to get the number of elements in a JavaScript array?

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Avatar Stefan Trost
0Best Answer0 Votes

In JavaScript, every array has the property "length" with which you can determine the length:

var arr = [1, 2, 3];
var len = arr.length;
alert(len);  // 3

Or for two-dimensional arrays:

var arr = [[1, 2, 3], [1, 2, 3]];

for(var i in arr) {
  alert(arr[i].length);
}

With count(arr), you can get the array length in PHP.
2014-05-22 at 16:32

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