Iterating over sequences using for each

When we have a sequence of things, we often want to go through it item by item. We can, of course, do that using a for loop, like this:

names = ["Anna", "Bob", "Carl", "Danielle"]
for i = 0 to names.length
    print "Hi " + names[i]
end_for

On the first line, we declare an array of strings containing some names. We are using a variable called names to store the values.

Then, we use a for loop, starting at 0. To find out how many times we will iterate, we ask the array how many items it currently has stored. We do that by using the names variable, and, by using a dot, we can get what is known as a property from the array. This property is a value that stores how many items the array currently has. The way we can ask a sequence how many items it has will differ from language to language, but it will most likely be something like what we have done.

We need to remember...