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# 6.2. Looping Through an Array

## Problem

You want to access or process all of the elements of an array in sequential order.

## Solution

Use a `for` loop that increments an index variable from 0 to `Array.` `length` - 1. Use the index to access each element in turn.

## Discussion

To access the values stored in the elements of an array, loop through the array’s elements using a `for` loop. Because the first index of an array is 0, the index variable in the `for` statement should start at 0. The last index of an array is always 1 less than the `length` property of that array. Within the `for` statement, you can use the loop index variable within square brackets to access array elements. For example:

```myArray = ["a", "b", "c"];
for (var i = 0; i < myArray.length; i++) {
// Display the elements in the Output window.
trace("Element " + i + ": " + myArray[i]);
}```

The looping index variable (i in the example code) should range from 0 to one less than the value of the `length` property. Remember that the last index of an array is always one less than its `length`.

Alternatively, you can also use a `for` statement that loops backward from `Array.` `length` - 1 to 0, decrementing by one each time. Looping backward is useful when you want to find the last matching element rather than the first (see Recipe 6.3). For example:

```myArray = ["a", "b", "c"];
for (var i = myArray.length - 1; i >= 0; i--){
// Display the elements in the Output window in reverse order.
trace("Element " + i + ": " + myArray[i]);
}```

There are many examples in which ...

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