Only one line is displayed. OK has to be clicked on the displayed panel to get the next line.

You can combine any number of text snippets together with the plus sign.

Using the plus sign to combine text is called concatenation.

In programming, text is referred to as string data.

JavaScript (and many other modern programming languages) uses a powerful model called object-oriented programming (OOP). This style of programming has a number of advantages. Most important for beginners, it allows you access to some very powerful objects that do interesting things out of the box.

• Properties: Characteristics about the object, such as breed and age
• Methods: Things the objects can do, such as moo() and giveMilk()
• Events: Stimuli the object responds to, such as onTip