How to print/display an array in jquery

Question

I have an array

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

How to display all items of the array using an alert box?

I have tried : alert(arr); and it shows nothing.

Edit: I want display this array like php print_r function.

 output needed like: array["key" => "value", "key" => "value", ...];

Answer 1

You could also use the JavaScript function toString().

alert(arr.toString());

Answer 2

To show them in csv, you can use .join(",") along with array object:

alert(arr.join(", "));

for printing individually:

$.each(arr, function( index, value ) {
  alert( value );
})

Answer 3

As I'm wondering why console.log() hasn't been provided as an answer, here it is.

Do:

console.log(arr);

And open the developper toolbar (F12 on most browsers) and go to the console tab. You should be able to see and expand your array.