Question

How to loop over an array with for and forEach in JavaScript

Answer 1

var arr = ["aaa", "bbb", "ccc", "ddd"];

arr.forEach(function (item, index, array) {
  document.write("arr[" + index + "] = " + item + "<br />");
});


/*
run:

arr[0] = aaa
arr[1] = bbb
arr[2] = ccc
arr[3] = ddd

*/

 

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Answer 2

var arr = ["aaa", "bbb", "ccc", "ddd"];

for (i = 0; i < arr.length; i++)
  document.write("arr[" + i + "] = " + arr[i] + "<br />");


/*
run:

arr[0] = aaa
arr[1] = bbb
arr[2] = ccc
arr[3] = ddd

*/

 

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