In computer programming, this allows you to use a function knowing WHAT it does but not necessarily HOW it does it.

Directions for how a collection of functions behave and can be used

A group of functions (procedures) that may be used in creating new programs

a variable used as a place holder for a value passed to a function

a value passed to a function

In the above picture, this would be an example of a:

In the above picture, this would be an example of a:

A variable whose scope is "global" to the program, it can be used and updated by any part of the code. Its global scope is typically derived from the variable being declared (created) outside of any function, object, or method.

A variable with local scope is one that can only be seen, used and updated by code within the same scope. Typically this means the variable was declared (created) inside a function -- includes function parameter variables.

A function must always have parameters in order for it to work.

A function must have a return value in order for it work properly.

A function can have a parameter(s) but not necessarily have a return value.

A function can have a return value but not necessarily have any parameters.

Which of the following is FALSE regarding functions?

Look at this code. Which of the following will be shown in the console log when this program is ran?

A function is also known as a procedure

An argument can include:

Which of the following is FALSE regarding return values?

A function return value can never be stored inside a variable.

Parameters and return values allow you to write programs that are more organized and cleaner.

Look at this code. Which of the following will be shown in the console log when this program is ran?

Generally it is up to you (as the programmer) to decide how a returned value will be used in the rest of your program.

Which of the following is FALSE regarding guidelines you should follow in writing functions with return values?

In the example above, we say that lives is a local variable.

We say that function parameters are a form of a local variable because (choose all that apply):

One of the disadvantages of writing functions that use parameters and return values is that it repeats code multiple times making your program disorganized and not very clean.

Once functions are written that take parameters and return values, it's easier to reuse that code in other places of your program.

Looking at this image, which of the following would be considered a parameter for the function totalCost?

The function move(id, direction) could be used to move an element in any direction, rather than writing separate functions for each direction. This is considered an example of:

What will print to the console after running this code segment?

What is printed to the console log?

console.log (12 % 3);

A library should have all of the following documentation EXCEPT:

Looking at the above documentation here, what else should be included here (in place of the question marks)?

In Lesson 7 you answered we discussed potential problems that could come up if you tried to use a function without knowing what it does or how to interact with it. Those included all of the following EXCEPT:

Before adding a function to a library, check for any use of a local variables within the function. If there is, rework the function using global variables and a return.

Before adding a function to a library, check if another function is called in this function. If so, both functions should be included in the library.

When creating a library (check all that apply):

As a user, what information would you need to know in order to use a particular library function?

One benefit of hiding all of the code when filtering the dataset in a library would be that it makes your coding organized and neat.

What are the benefits of using existing algorithms instead of brand new algorithms (check all that apply)?

When we organize functions into a library and then call them in another program, we are really practicing this (check all that apply):

What is the output of the following program?

What is printed by the following program?

What will be printed to the screen when the following program is run?

function start(){

println(doubleNumber(doubleNumber(10)));

}

function doubleNumber(x){

var doubledX = 2 * x;

return doubledX;

}

In the following function printThreeTimes:

function printThreeTimes(word){

println(word);

println(word);

println(word);

}

What is the parameter of the function?

What is the minimum number of parameters that must be given when calling the ‘drawCircle’ function?

function drawCircle(radius, x, y, color) {

var circle = new Circle(radius);

circle.setPosition(x, y);

circle.setColor(color);

add(circle);

}

// This function prints out the area of a rectangle given its base and height function rectangleArea(base, height){

var area = base * height;

println(area);

}

What are the names of the parameters?

What is printed by the program?

How many parameters go into the function sum, and how many return values come out of the function sum

function sum(first, second, third){

var result = first + second + third;

println(first);

println(second);

println(third);

return result;

}

Look at the screenshot. Examples of arguments would include (click all that apply):

Look at the screenshot. Examples of parameters would include (click all that apply):

Look at the screenshot. An example of a return that could take place in this function would be 12

Look at the screenshot. In order to rewrite this program to include parameters for the "searchTypeList" function, would could eliminate:

Look at the screenshot. In order to eliminate the global variable called "selection", one solution would be to add a parameter to the "checkAnswer" function.