Exam 9: Additional Javascript Basics: Window Object, If Statement, Strings, Numbers, and Input Validation

A dialog box is a control that supports verbal two-way communication between the user and the computer.

Provide a functionally equivalent, shorter version of the following code: window.document.getElementById["name"]

When should you use dialog boxes (alert, confirm, and prompt) for input and output?

How can you test two strings to see if they are equal?

When the following code executes, what message does the dialog box display? var month = "January"; if (month.toLowerCase() == "january") { alert("It is " + month + "!"); }

To break/split a string in JavaScript, you should terminate the first part of the string with a closing quote, insert a(n) ______, and start the next line's continuation string with an opening quote.

The following code generates a dialog box that contains a question and an input box: prompt("What's your favorite color?", ""); Initially, what displays inside the input box?

What does the following expression evaluate to? 39 % 10 / 4

The output element is for holding the result of a user's action.

Suppose a variable x holds "dog". After the following code gets executed, what does x hold? x += "fish";

What is the syntax for generating a dialog that displays a message and does not receive input?

The <code>window</code> object's <code>screen</code> property holds information about the monitor that is being used.

A(n) __________ is a pictorial representation of the logic flow of a computer program.

Proper coding conventions suggest that when there are JavaScript statements inside of braces ({}), you should do which of the following?

After the following code executes, what does x hold? var animal = "porcupine"; var x = animal.lastIndexOf("p", 3);

How can you round a price variable's value to the hundredths place (e.g., 204.89)?

A block statement (zero or more statements surrounded by braces) can be used anywhere a standard statement can be used.

For the "if, else if, else" form of the if statement, if a condition is found to be true, that condition's block statement is executed. Then, all the other conditions are skipped, and control flows down to the statement below the entire if statement.

The window object is known as the global object because all of its members are global.

Suppose you have a variable named character. What is the best way to assign a double quote (") to character?