UNIT 4

Question 1

U4L1 Evaluate

Answer 1

+

Question 2

U4L1 Can you use the / operator to concatenate?

Answer 2

No, only the + operator to concatenate.

Question 3

U4 L10
What will the statement show after running the code?

KEEP IN MIND: var changes at top of screen, which of the two are displayed?

Answer 3

It will display “School day”

sat -> mon, mon != sat or sun so “else”, “else”=weekday, weekday= SD

Question 4

U4 L8
What part of the code do you use flowcharts for?

Answer 4

if else statements

Question 5

U4 L8
STATEMENTS
what does the “if” statement do?

Answer 5

specifies a block of code

Question 6

U4 L8
STATEMENTS
what does the “else” statement do?

Answer 6

if the same condition is false, it specifies the execution for a block of code

Question 7

U4 L8
STATEMENTS
what does the “else if” statement do?

Answer 7

tests if the first condition is false

Question 8

U4L2
how do “getText” and “getNumber” work?

Answer 8

grabs the text/number from the chosen line of code

getText (“locationDropdown”) ;
= gets text from locationDropdown

Question 9

U4L3
how many times do you have to create variables and why?

Answer 9

once, can cause errors

Question 10

U4L3
where should you keep your variables and why?

Answer 10

at the top of the program to stay organized

Question 11

U4L3
should your variables be created inside or outside a function or onEvent?

Answer 11

outside

Question 12

U4L11
if I want the screen to update as I type, in stead of “onEvent(“downButton”, “click”, function( ) {“ what should I write?

Answer 12

onEvent(“downButton”, “change”, function( ) {

Question 13

U4L2
how do I get a users name input to show on the screen output

(ex: they’d type “Jassy” and Jassy would be shown somewhere on screen)

Answer 13

getText, (ex:
userName = “Hi, “ + getText(“nameInput”)+”!”;
)

Question 14

U4L2
how do I get a value of a variable to increase or decrease? (ex: value goes up or down)

Answer 14

math (+-)

( ex: tempF = tempF + 1; )

Question 15

U4L2
which programs should comments be used in and why?

Answer 15

every program, helps the debugging process

Question 16

U4L4
where should comments be used, placed, and what should they include?

Answer 16

should be used above every onEvent, function, starting variables, and include purpose & purpose

Question 17

U4L4
what does “\n” do?

Answer 17

creates a new line of output

Question 18

U4L5
what does a flowchart do?

Answer 18

visualizes an if-else statement before using it

Question 19

U4L5
true or false, “ 6+3 == 3+4” ?

Answer 19

false

Question 20

U4L6
can an expression deal with a “maybe” answer

Answer 20

yes, develop a range (ex: 1) yes 2) sometimes 3) no)

Question 21

U4L6
how do u evaluate a percentage?

Answer 21

long division

Question 22

U4L6
what does the following if-else statement mean?
“if (score > 15){
setProperty(“lemon”,”width”,60);
setProperty(“lemon”,”height”,60);
} else if (score > 10) {
setProperty(“lemon”,”width”, 100);
setProperty(“lemon”,”height”, 100);
} else {
setProperty(“lemon”,”width”, 140);
setProperty(“lemon”,”height”, 140);
}”

Answer 22

if the score is greater than 15 the lemon is set at 60 w&h
if the score is greater than 10 the lemon will increase in size by +40
if-else (is greater than 15) the lemon will increase in size by +40 once again

Question 23

U4L7
what code is used to get a screen to change when a button is clicked

Answer 23

onEvent and setScreen

Question 24

U4L8
if I wanted to make a discountCode on something that cost $$$ what should I do?

Answer 24

create if-else statement, some kind of math code, and set the price to discount

ex: price=0

Question 25

U4L9
what is myFunction and function? what does it help with?

Answer 25

function: a repeated line of code
myFunction: calls the function to a line of code
-helps shorten the amount of code without lines being reused
-organizes unnecessary added code

Question 26

U4L9
where should a function be placed in code and why?

Answer 26

the bottom of the function to get it out of the way of the rest of the code

Question 27

U4L10
when there is a bug in your program and you don’t know what it is, what should you do and why?

Answer 27

get a second set of eyes because it can be a mistake that may go unnoticed for you

Question 28

U4L2
why do id names need to be unique?

Answer 28

so you know exactly what the function is and what it does

Question 29

U4L1
what will the value of “score” be at the end of the program?

Answer 29

“The score is: 4”

just “4” isnt correct, the string “The score is:” mustn go unnoticed

Question 30

U4L2
what is “myVar” first set at and what does the onEvent do?

Answer 30

the myVar first is set with a value of zero. When clicked, the myVar ‘s current value (0) will add on 1. every time the button is clicked the value will go up by one.

Question 31

U4L3
what will be displayed once the code is ran?

Answer 31

6

first the value is 2, then set to 5, lastly 5+1, which equals:

Question 32

U4L3
which of the following COULDNT be output from the program?
a) 1,1,20,20
b) 2,2,11,11,
c) 10,10,10,10
d) 10,5,10,5

Answer 32

d

a= 1-10
a=1-10
b=10-20
b=10-20
last two lines HAVE to be >=10

Question 33

U4L11
what are the steps to creating a dropdown?

Answer 33

1. dropdown in code
2. creating variable
3. “var= get__”

4. (OPTIONAL) updateScreen (function)

Question 34

U4L11
if I want the size to increase or decrease AS I change it, what part of the code should I change?

ex: onEvent(“fontSizeInput”, “click”, function( ) {

Answer 34

change “click” to input

onEvent(“fontSizeInput”, “input”, function( ) {

Question 35

U4L11
why is it bad to have grey and red as a font color

Answer 35

grey=harder to see
red=bad for colorblind people

Question 36

U4L12
if I were to make an app on what to wear based on the weather, what variables should I consider?

Answer 36

time, place, weather, temperature, and event

Question 37

U4L12
how many times should a updateScreen function be called in a program?

Answer 37

ATLEAST two times

there is no point of a function if not called multiple times

Question 38

U4L12
why would a function be used?

Answer 38

to update a screen

Question 39

U4L12
before going straight into coding your program, what should you do first?

Answer 39

design the app