Download PDF by Steven W. Disbrow: JavaScript Weekend Crash Course

By Steven W. Disbrow

ISBN-10: 0764548042

ISBN-13: 9780764548048

Study JavaScript quickly! With JavaScript Weekend Crash Course, you will get up to the mark programming JavaScript functions in one weekend!

This publication starts off in the beginning and assumes no earlier JavaScript adventure. you are going to examine the necessities of JavaScript from Friday night via Sunday afternoon.

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It’s purely a personal style that I’ve developed over the years that, for me, makes source code more readable. JavaScript ignores white space characters (spaces, tabs, and carriage returns), so you can arrange your blocks of code in the manner that’s the most readable to you. When used all by itself, the if statement is really only good for one thing: excluding a block of code from being executed. What if you need to choose between two blocks of code? ”); } The concept here is very simple: if the condition in parentheses evaluates to true, then you execute the code block immediately following the condition.

In this case, this statement is used to increment the counter variable by one each time through the loop. So, when this loop executes, it will execute the statement totalValue += strollerPrice; over and over until the counter++ statement causes counter to reach a value greater than the value of numStrollers. At that point, the loop will end, the counter variable will be discarded, and totalValue will contain a value of 2985. The continue statement You’ll often find yourself performing a series of tests in the loops you create.

Asking logical questions in a JavaScript program is just as easy. You simply compare the value of one variable (the amount of change in your pockets) to some other value (the cost of the soda) and then react based on the result (which is true or false). Comparison operators In the above example, the comparison we were making was to see if the amount of change we had was less than or equal to the cost of a soda. However, there are lots of other types of comparisons you can make in JavaScript. Each type of comparison has its own operator and the result of any of these comparisons will be either a true or false Boolean value.

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JavaScript Weekend Crash Course by Steven W. Disbrow

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