JavaScript Console & Graphics Review

Front

What function will output the text "Hello"? Options: output("Hello");, add("Hello");, printLine("Hello");, println("Hello");

Back

println("Hello");

Answer explanation

The function 'println("Hello");' is the correct choice as it outputs the text 'Hello' to the console, typically adding a newline after. The other options do not correspond to standard output functions in most programming languages.

Front

What function would you use if you want to ask a user for an integer? Options: readLine(), readString(), readInt(), readFloat()

Back

readInt()

Answer explanation

To ask a user for an integer, the correct function is readInt(). This function specifically reads and converts user input into an integer type, while the other options do not serve this purpose.

Front

What is the correct syntax for asking a user for their name? Options: var name = readLine("What is your name?");, var name; printLn("What is your name?");, readLine("What is your name?");, var name = "What is your name?"

Back

var name = readLine("What is your name?");

Answer explanation

The correct syntax for asking a user for their name is 'var name = readLine("What is your name?");'. This line declares a variable 'name' and assigns it the value returned by the readLine function, which prompts the user.

Front

What do we call the information that goes in between the parentheses when we call a function? Example: println("Hello")

Back

argument(s)

Answer explanation

The information inside the parentheses when calling a function is called 'arguments'. In the example println("Hello"), "Hello" is the argument passed to the println function.

Front

What is an integer?

Back

A whole number, either positive or negative

Answer explanation

An integer is defined as a whole number that can be either positive or negative, such as -3, 0, or 5. This distinguishes it from fractions or decimal numbers, making the first choice the correct answer.

Front

What is the punctuation that we always use around strings?

Back

Double quotes ""

Answer explanation

In programming, strings are typically enclosed in double quotes ". This is a standard convention in many languages, making "Double quotes" the correct choice for surrounding strings.

Front

What is a float?

Back

A number with a fraction expressed as a decimal

Answer explanation

A float is defined as a number that includes a fraction, represented in decimal form. This distinguishes it from whole numbers, which do not have fractional parts.

Front

What is the definition of an Object in JavaScript?

Back

A container that can hold multiple named values (properties) and methods.

Answer explanation

An Object in JavaScript is defined as a container that can hold multiple named values (properties) and methods, making the first choice the correct answer. Other options describe different data types or structures.

Front

If you are not sure how to create a new Rectangle, what should you do?

Back

Consult the CodeHS documentation for Rectangle

Answer explanation

The best approach is to consult the CodeHS documentation for Rectangle. This will provide accurate and detailed information on how to create a new Rectangle, rather than guessing or searching online.

Front

What two functions can we use to get the total height and width of the Canvas?

Back

getHeight();
getWidth();

Answer explanation

The correct functions to get the total height and width of the Canvas are getHeight() and getWidth(). These methods are commonly used in programming environments that support canvas operations.