UNIT 4 Flashcards
covers everything that was taught in U4
U4L1 Evaluate
+
U4L1 Can you use the / operator to concatenate?
No, only the + operator to concatenate.
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?
It will display “School day”
sat -> mon, mon != sat or sun so “else”, “else”=weekday, weekday= SD
U4 L8
What part of the code do you use flowcharts for?
if else statements
U4 L8
STATEMENTS
what does the “if” statement do?
specifies a block of code
U4 L8
STATEMENTS
what does the “else” statement do?
if the same condition is false, it specifies the execution for a block of code
U4 L8
STATEMENTS
what does the “else if” statement do?
tests if the first condition is false
U4L2
how do “getText” and “getNumber” work?
grabs the text/number from the chosen line of code
getText (“locationDropdown”) ;
= gets text from locationDropdown
U4L3
how many times do you have to create variables and why?
once, can cause errors
U4L3
where should you keep your variables and why?
at the top of the program to stay organized
U4L3
should your variables be created inside or outside a function or onEvent?
outside
U4L11
if I want the screen to update as I type, in stead of “onEvent(“downButton”, “click”, function( ) {“ what should I write?
onEvent(“downButton”, “change”, function( ) {
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)
getText, (ex:
userName = “Hi, “ + getText(“nameInput”)+”!”;
)
U4L2
how do I get a value of a variable to increase or decrease? (ex: value goes up or down)
math (+-)
( ex: tempF = tempF + 1; )
U4L2
which programs should comments be used in and why?
every program, helps the debugging process
U4L4
where should comments be used, placed, and what should they include?
should be used above every onEvent, function, starting variables, and include purpose & purpose
U4L4
what does “\n” do?
creates a new line of output
U4L5
what does a flowchart do?
visualizes an if-else statement before using it
U4L5
true or false, “ 6+3 == 3+4” ?
false
U4L6
can an expression deal with a “maybe” answer
yes, develop a range (ex: 1) yes 2) sometimes 3) no)
U4L6
how do u evaluate a percentage?
long division
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);
}”
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
U4L7
what code is used to get a screen to change when a button is clicked
onEvent and setScreen
U4L8
if I wanted to make a discountCode on something that cost $$$ what should I do?
create if-else statement, some kind of math code, and set the price to discount
ex: price=0
U4L9
what is myFunction and function? what does it help with?
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
U4L9
where should a function be placed in code and why?
the bottom of the function to get it out of the way of the rest of the code
U4L10
when there is a bug in your program and you don’t know what it is, what should you do and why?
get a second set of eyes because it can be a mistake that may go unnoticed for you
U4L2
why do id names need to be unique?
so you know exactly what the function is and what it does
U4L1
what will the value of “score” be at the end of the program?
“The score is: 4”
just “4” isnt correct, the string “The score is:” mustn go unnoticed
U4L2
what is “myVar” first set at and what does the onEvent do?
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.
U4L3
what will be displayed once the code is ran?
6
first the value is 2, then set to 5, lastly 5+1, which equals:
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
d
a= 1-10
a=1-10
b=10-20
b=10-20
last two lines HAVE to be >=10
U4L11
what are the steps to creating a dropdown?
- dropdown in code
- creating variable
- “var= get__”
4. (OPTIONAL) updateScreen (function)
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( ) {
change “click” to input
onEvent(“fontSizeInput”, “input”, function( ) {
U4L11
why is it bad to have grey and red as a font color
grey=harder to see
red=bad for colorblind people
U4L12
if I were to make an app on what to wear based on the weather, what variables should I consider?
time, place, weather, temperature, and event
U4L12
how many times should a updateScreen function be called in a program?
ATLEAST two times
there is no point of a function if not called multiple times
U4L12
why would a function be used?
to update a screen
U4L12
before going straight into coding your program, what should you do first?
design the app
