Sometimes you want to repeat an action in Ruby while a certain condition is true, but you don't know how many times you'll have to repeat that action. A good example would be prompting a user for a...

Did you see that? The loop printed out the numbers 1 to 10, then stopped. This was because the loop's condition said to continue while [...] was less than 11; since [...] went up by 1 each time...

The complement to the [...] loop is the [...] loop. It's sort of like a backward [...] : [...] 1. In the example above, we first create a variable [...] and set it to [...] (zero). 2. ...

We've been using syntax like [...] , which works, but as you'll increasingly find with Ruby, there's always another way. A shortcut is to use an assignment operator. You already know one assign...

Sometimes you do know how many times you'll be looping, however, and when that's the case, you'll want to use a [...] loop.

You saw a bit of new syntax in the previous exercise: [...] . What this says to Ruby is: "For the variable [...] in the range [...] to [...] , do the following." The following was to [...] ,...

Good work! You're ready to build your very own [...] loop.

So far we've learned one way to repeat an action in Ruby: using loops. As is often the case in Ruby, however, there's more than one way to accomplish a given task. In this case, it's also possible ...

The [...] keyword can be used to skip over certain steps in the loop. For instance, if we don't want to print out the even numbers, we can write: [...] 1. In the above example, we loop throug...

Let's say we want to save a range of numbers in a variable. How would we do this? A variable can only hold a single value, right? In Ruby, we can pack multiple values into a single variable using ...

Great work! You're really getting the hang of this. The [...] iterator is the simplest, but also one of the least powerful. A more useful iterator is the [...] method, which can apply an expre...

Cool, no? Now it's your turn to take the [...] method for a test drive. [...] 1. In the example above, we create an array called [...] . 2. Then we show two different ways to print each ite...

The [...] method is like a super compact [...] loop: it can perform a task on each item in an object a specified number of times. For example, if we wanted to print out [...] ten times, we m...

Okay, training wheels off. Let's see your stuff! [...] 1. In the above example, we create a variable called [...] and set it to [...] . 2. Then, we print out [...] since we execute the loo...

Good work! [...] In the example above, we wrote the same loop using [...] and using [...] .

In case you're not picking up on the theme of Ruby having a gajillion ways to do any given task: let's convert our loop yet again. [...] In the above example, we print out [...] by virtue of ...

Great work! We'll give you a bit of a break from the numbers game. [...] In the example above, we print out [...] since we loop 10 times.

Finally, let's replace our [...] with the [...] iterator.