JavaScript and Graphics

What keyword do you need to use to define a variable in JavaScript?

• variable

• var

• int

• x

What function do you need to call to ask the user of the program to enter text?

• readLine

• readln

• readString

• println

To ask the user of the program for a number, which function should you use?

• readLine

• readFloat

• readInt

• Both readInt and readFloat are for numbers.

What will the following code print to the screen?

println(2 + 2):4

What symbol do you use to do division in JavaScript?

What function do you need to call to get the width of the screen?

• width()

• getWidth()

• screenWidth()

• getScreenWidth()

A store has 20 apples in its inventory. How can you store this information in a JavaScript variable?

• var numApples == 20;

• 20 = numApples;

• var numApples = 20;

• var num apples = 20;

You want to read input from the user to know how many apples they would like to buy. Which statement should you use to read in a number from the user?

• var applesToBuy = readLine("How many apples would you like? ");

• var applesToBuy = println("How many apples would you like? ");

• var applesToBuy = readInt("How many apples would you like? ");

• var applesToBuy = nextInt("How many apples would you like? ");

You are splitting up all of your apples equally between 3 people. Which statement below will calculate how many apples will be left over?

• var leftOver = numApples / 3;

• var leftOver = 3 / numApples;

• var leftOver = numApples % 3;

• var leftOver = 3 % numApples;

Which of the following choices is a properly formed JavaScript variable name, meaning it is both legal in the JavaScript language and considered good style?

• 
  

  user_age

• 
  

  UserAge

• userAge

• User age