Variables and data types

Question 1

Example languages that run directed on the OS

Answer 1

C++, Java, C#, Objective-C

Question 2

Example scripting languages that run through another application

Answer 2

ActionScript, Javascript, VBScript

Question 3

actionscript runs on

Answer 3

flash

Question 4

javascript runs

Answer 4

through browsers

Question 5

VBscript runs

Answer 5

on MS office

Question 6

scripting languages are ______ languages

Answer 6

interpreted

Question 7

languages that have curly brackets {, } or semi colons ; are languages that influenced by __________ programming

Answer 7

C

Question 8

write script for a little popup thats says Hello World

Answer 8

alert(“Hello World”);

Question 9

variables are used to ….

Answer 9

hold data

Question 10

var year;

variable =

Answer 10

year

Question 11

var date;

variable =

Answer 11

date

Question 12

THIS ENTIRE COURSE IS BASED ON

Answer 12

Javascript!

OTHER LANGUAGES MAY BE DIFFERENT

Question 13

Rules for writing variables

IN JAVASCRIPT

Answer 13

1) Can use letters
2) Can use numbers
3) Can use $ (dollar sign)
4) Can use _ (underscore)
5) cannot start variable with a number sign

Question 14

creata a variale that is = 2011

Answer 14

var year;

year = 2011;

Question 15

var year;
year = 2011;

shorten this statement

Answer 15

var year = 2011;

technically:
year = 2011;

is equivalent to var year = 2011;

because javascript will look for a variable called year and will assume year = 2011; = var year = 2011;

Question 16

are variables case sensitive?

Answer 16

YES

Question 17

shorten

var month;
var day;
var year;

Answer 17

var month, day, year;

Question 18

variable data types

name a few basics

Answer 18

1) integer (whole number: 55, 345, 65465)
2) floating point number (has decimal: 55.33, 5564.3355)
3) single character (a, B, f, g)
4) string( bunch of characters)
5) boolean (true or false)

Question 19

What’s wrong with this?

var phrase = “He said “that’s fine” and left”;

Answer 19

Javascript will assume you meant

var phrase = “He said “

and that’s fine” and left”; is separate

Question 20

how to fix

var phrase = “He said “that’s fine” and left”;

Answer 20

var phrase = “He said "that’s fine”\ and left”;

use backward slash

Question 21

using variables, write a script to subtract 100 from 200

Answer 21

var a = 100;
var b = 200;
var result = b - a;

Question 22

using variables, write a script for 300 divided by 100 decided 8

Answer 22

var a = 300;
var b = 200;
var c = 8;
var result = a / b;
var result2 = result/c

or

var a = 300;
var b = 200;
var c = 8;
var result = a / b / c;

Question 23

shorten

score = score + 100;

Answer 23

score += 100;

Question 24

shorten

score = score - 48;

Answer 24

score -= 48;

Question 25

a++;

is used for

Answer 25

an increase of an increment of 1

it is equivalent to a+=1; or a = a+1;

Question 26

++ is called the

Answer 26

increment operator

Question 27

– is called the

Answer 27

decrement operator

Question 28

does javascript care about whitespace?

Answer 28

NO, because of the semi solon ; signals the end of statement

Question 29

what do you write in javascript to cause a line break?

Answer 29

\n

Question 30

what do you write to start a comment?

Answer 30

//

this only works with 1 line

Question 31

how do you have a multiple line comment?

Answer 31

Starts comment > /*

*/