Our JavaScript interpreter is going to have to compute the value of 6 factorial, a function call within a function call within a function call.

Here I've written three Python expressions, each one of which is a constant string.

This follows the same 3 step process we saw before create a new image, set its on load result, and then set its source.

This selection goes to the left as far as it can but does not include pindex, so it will be bell.

If you print repr around it, you'll get some extra quotes, and it'll print properly.

Here's an example of how to use this procedure.

And, in fact, I'll do the first and second parts for you.

And now I have the expressions for function calls, not just decorations, which we had in the

Now for a quiz.

That's called a stack frame.

Most of it is contained in this main page handler.

A classic example for the use of assertions is a square root program.

And let's give this a test.

Then we make the call to replace spy, passing in spy.

If its all zeros then A star resorts back to the search algorithm already implemented.

That's how Fortran does their titles and stuff.

Now, there are two uses of stars and star star.

Parents equals whatever this key. We'll call that k.

If its format is basically else if it's format HTML use the HTML template.

And we have all the rules for expressions that we used to have before, but now we're going to add function calls.

We can think of what the interpreter is doing now. Instead of running the code here, the interpreter will move.

It gives you true if the random value happens to be larger than 0.5 and false if it's smaller.

We will have for instance a breakpoint in line 9, and possibly another one in line 14.

And what this does is it says Class By Name which just refers to itself.

Let's go through our program and just notice everything we end up using.

So let's give this a quick run to make sure it works.

So that should make a link.

If, for instance, I have set up the traceit function, which gets called for every line as always.

In a function definition, it basically takes all the parameters and puts them into a tuple.

If it's 1 or more arguments, they're going to be expressions separated by commas.

We use function calls to access user interaction or generally anything that comes form the environment.

Here again, we have a buggy function and now let's conduct the experiment.

Here is a square root function. It takes x and returns the square root.

It's n times the factorial of n 1.

A program interactions with its environment by means of function calls.

I'm going to extend this such that the test now comes as a parameter.

One is in the function definition, which we talked about before, and the other is in the function call.

We want to return a particular value value corresponding to a function.

It turns out that the output of specification mining often takes the form of a formal grammar or some sort of state machine

These two kinds of assertions form a pair and both of them have very specific objectives.

So, here's how we make such a robot. It's really easy.

Once this is done we can actually call this setlnterval function, which will call the animate function at the frameRate that we provided before.

Firstly, at the top of our file we declare two new variables, frameRate and frame.

So, this one moves forward, it will move slightly upwards.

I'm going to have to call makegreeter on hello.