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

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.

Step 5

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.

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

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

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

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

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

We know that each frame contains the function name as well as all local variables.

And let's give this a test.

Most of it is contained in this main page handler.

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

You record the call and return events.

The contents of the four registers are preserved by the called subroutine.

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

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

Let's see what this does.

That's how Fortran does their titles and stuff.

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

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

Function must be called from the main thread.

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

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

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

I want you to output these as assertions that can be inserted immediately into the code.

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

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

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

So that should make a link.

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

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

Now for a quiz.

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.

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

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

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

So we can call this we could say that this is equal to

That's called a stack frame.

In the global environment, we define a function Apache, and the first thing we do is call it with the inputs 9 and 10.

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

So, at this moment we are in replay mode.