Variables are an extremely important aspect of programming. By look, variables are simply single word names,
like score to keep track of the score in a game, count to keep track of hits on a website, or x as
a variable in a math problem.
By purpose, variables are used to keep track of some information in a program that may change. For example, at one
moment in a game, the score might be 100. A few seconds later, it might be 200.
In this lesson, you'll be able experiment with variables and see how they work.
Move the mouse over a dotted box for more information.
Note that the name of your variable does not have to be "variable" as shown above. Often it is better to choose a variable some name that gives it some context.
If you were keeping score in a computer game for example, you'd call the variable score or game_score. In mathematics, x and y are often used as
variables, but with the computer and keyboard, you are free to have more descriptive variables. How about money or amount_left or EmployeeName?
The only condition on variable names is that they start with a letter of the alphabet, contain no spaces, and typically cannot contain any funny characters
either (like !@#$%^&). Variables can contain the underbar _ however.
Now you try. Try setting a variable to some value, then printing that value through the variable name.