Programming Control Structures with JavaScript

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Presentation transcript:

Programming Control Structures with JavaScript MIS 2402 Jeremy Shafer Department of MIS Fox School of Business Temple University

Let’s talk about… Chapter 3 What is the difference between assignment and comparison operators? What are some control structures that use comparisons? How is programming like a sandwich?

Agenda Using breakpoints the Chrome Developer Tools Conditional Expressions Putting conditional expressions to work: If statements

Breakpoints Setting one or more breakpoints in your code will allow you, the developer, to get a better understanding of how your code is working. Let’s see an example of this. (see rocket.zip)

The relational operators We use these operators to compare values

Conditional expressions Expressions evaluate to true or false. What do each of these expressions evaluate to?

Another test The syntax of the global isNaN method isNaN() is a global method. The term “global” means it is available everywhere in your JavaScript code. Global methods are also sometimes called functions.

The logical operators

Conditional expressions with logical operatiors Expressions evaluate to true or false. What do each of these expressions evaluate to? So – what does this evaluate to: !(1 == 2) && 'monkey' == 'monkey' || 'elephant' == 'hippo'

Putting conditional expressions to work! The syntax of the if statement

An if statement with multiple else clauses

Let’s give this a try…