Why does this code delete only even elements within the array? I would expect the for loop to iterate through each value, 0 through 3, and delete each element one at a time. But it is only deleting a[0] and a[2]. What am I doing wrong? Thanks in advance--

```
a=%w(ant bat cat dog)
puts a.inspect #output: ["ant", "bat", "cat", "dog"]

for k in (0..3)
    a.delete_at(k)
end

puts a.inspect #output: ["bat", "dog"]

```

UPDATE--

Thank you for your responses; I see what I was doing now. In order to delete each element of the array, the Array method 'shift' would be appropriate. For example: 

```
for each in (0..3)
    a.shift
    print a
end

```

This would shift the first element out of the array, and move each subsequent element forward one cell. Thank you for the recommendation to use 'each'--I can see that it is the preferred syntax.

UPDATE 2--

Would the following section of code be more representative of proper ruby syntax?

```
(0..3).to_a.each do
    a.shift
    p a
end

```

And Thanks to Glenn for the suggestions on deleting contents of an array.