Complete Idiot's Guide to JavaScript by Aaron Weiss

By Aaron Weiss

Able to make your website rock? Then try out JavaScript. it is the new scripting language everyone's speaking approximately. With JavaScript, you could construct robust applets that upload pizzazz and interactivity for your web site. to exploit this new language, you wish the chief of the band, the entire Idiot's advisor to JavaScript, moment version. Its funny method of studying may have you writing JavaScript applets very quickly. you are going to the way to upload multimedia, animation, sound, and extra on your web content. yet that is not all. you will additionally get an insider's view of the recent good points of JavaScript 1.1 and the way they combine with a number of net browsers. So upload a few rhythm for your websites with the booklet that does not omit a beat, the whole Idiot's advisor to JavaScript, moment Edition!Updated to hide the newest model of Netscape Navigator and web Explorer

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This expression is part of the statement definition, as in the for statement. In this example, you use the unary increment operator as your loop update expression; it increases the value of the loop counter count by 1 at each pass through the loop. The for statement is followed by an initial expression (which is often a variable assignment, but may be another statement), a test condition, a loop update expression, and finally, a block of statements to execute. htm Watch Your Syntax In programming, syntax refers to the "rules of grammar" (in other words, what words or symbols go where).

String operators are intended to work with string values, which you should recall are not numerals or arithmetic expressions. In addition, the comparison operators can be used with strings. Because strings are not numerals, how string operators work requires a little explanation. Checking for equality between two strings is fairly straightforward. Suppose you supply the following test (use literals for clarity, although in many cases you'd be using variable names): ❍ "dogs" == "cats" Clearly, the two strings are not equal (the same), so the comparison has a false result.

If the current order were a 10th purchase (an even multiple of 10), this division would yield a remainder of 0. The modulo operator can be used to return the remainder of a division. Therefore, the expression count%10 will return the value 0 on every 10th purchase. On the fourth line, you’ve got the bracketed expression immediately below the if clause, which determines what to do if the condition is true (that is, if this is a 10th purchase). Note that your if-true statement is continue. This will cause JavaScript to ignore the remainder of the statements in the brackets of the for statement and return to the top of the for loop.

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