Chapter 2 Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc.Slide 1 Objectives Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 2 Objectives (continued) Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 3 Objectives (continued) Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 4 Two attributes of the script element Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 5 A script element that embeds JavaScript in the head section Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 6 Terms Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 7 JavaScript in the body of an HTML document Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 8 The result of the JavaScript in a web browser Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 9 A noscript element in the body of the HTML Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 10 A block of JavaScript code Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 11 The basic syntax rules for JavaScript Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 12 How to split a statement over two or more lines Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 13 Rules for creating identifiers Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 14 Valid identifiers in JavaScript Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 15 Camel casing versus underscore notation Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 16 Naming recommendations Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 17 JavaScript code that includes comments Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 18 The syntax rules for JavaScript comments Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 19 Guidelines for using comments Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 20 Terms Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 21 Common methods of the window object Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 22 A statement that calls the prompt method with the object name omitted Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 23 One property of the window object Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 24 Terms related to objects Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 25 Number, string, and Boolean values Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 26 Terms related to data types Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 27 Common arithmetic operators Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 28 The order of precedence for arithmetic expressions Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 29 Terms related to numeric expressions Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 30 The most useful assignment operators Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 31 How to code compound assignment statements Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 32 Three ways to increment a counter variable Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 33 A floating-point result that isnt precise Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 34 Terms for working with variables Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 35 The concatenation operator for strings Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 36 Escape sequences that can be used in strings Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 37 How to declare string variables Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 38 How to code compound assignment statements Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 39 How escape sequences can be used in a string Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 40 How to declare Boolean variables and assign values to them Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 41 Terms for string expressions Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 42 How JavaScript interprets the plus sign in mixed expressions Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 43 Two methods of the window object for converting string values Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 44 The same examples with chaining Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 45 Terms Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 46 The relational operators Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 47 The syntax of the global isNaN method Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 48 The logical operators in order of precedence Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 49 Terms for conditional expressions Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 50 The syntax of the if statement Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 51 An if statement with else if and else clauses Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 52 An if statement with a compound conditional expression Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 53 How to test a Boolean variable Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 54 The syntax of a while loop Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 55 The syntax of a do-while loop Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 56 A while loop that gets the average of numbers Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 57 The syntax of a for statement Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 58 A for loop that calculates future value Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 59 Terms for conditional statements Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 60 The Calculate MPG application Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 61 The Calculate MPG application (continued) Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 62 The HTML and JavaScript for the application Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 63 The dialog boxes for the Test Scores application Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 64 The Test Scores application (continued) Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 65 The JavaScript in the HTML head section Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 66 The Firefox Error Console with an error Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 67 How to display the Firefox Error Console and the source code for an error Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 68 Common syntax errors Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 69 Extra 2-1: Convert number grades to letter grades Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 70 Extra 2-1: (continued) Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 71 Extra 2-2: Convert Fahrenheit to Celsius Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 72 Extra 2-3:Calculate income tax Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 73 Extra 2-3: (continued) Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 74 Short 2-1: Enhance the Test Scores application Murach's JavaScript and jQuery, C2 2012, Mike Murach & Associates, Inc. Slide 75