Course of Raku / Essentials / Positional data types / Exercises / Odd indices

# Solution: Odd indices

To solve this task, you can use the `loop`

construct and increment the loop variable by 2 on each iteration. But you can also use a `for`

loop and scan the numbers from 1 to the half of the length of the array, and then multiply them by two.

## Code

Here is the solution:

```
my @data = 10, 12, 1, 5, -9, 8, 36, 18, 21;
say @data[2 * $_ - 1] for 1 .. @data/2;
```

🦋 Find the program in the file odd-indices.raku.

## Output

First, run the program with the original data elements.

```
$ raku exercises/positionals/odd-indices.raku
12
5
8
18
```

Then, add one more item to the data:

```
my @data = 10, 12, 1, 5, -9, 8, 36, 18, 21, 22;
```

Confirm the new element with an odd index appears in the output:

```
$ raku exercises/positionals/odd-indices.raku
12
5
8
18
22
```

## Comments

In the next part of the course, we will return to this task to solve it using a completely different approach.