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Final Exam Review Spring 2004: JavaScript

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Questions and Answers?

(i=100; i>= 0; i–)
Correct?

Maybe show the whole thing? Mark Guzdial

The Simplest Possible Web REMOVED

A Simple Heading

This is a very simple web REMOVED

Well...that worked...I'm not sure how to show the actual stuff without it executing! if you want to see it, look at the "edit" REMOVED.....

<title> the simplest possible webpage </title>
<script>
function countToHundred()
{
   document.write("<ul>");
   for (i=100; i>= 0; i--)
   {
      document.write("<li> item number: ",i);
   }
   document.write("</ul>");
}
</script>
</head>
<body>
<h1>a simple heading</h1>
<p>this is a very simple web REMOVED</p>
<p><image src="mediasources/barbara.jpg" />
</p>
<script> countToHundred() </script>
</body>
</html>

Student1153

Or would it be the above but "for (i=1; i=100; i–)"? I have no idea...it was just a thought.

That would start the index at 1, decrementing each time, until the index was = 100, which would be immediately. Mark Guzdial

If you start your index at 1, and your condition for running your loop is that i=100, the loop will just never run and your code will continue to the next executable method. Generally, (like above), you set your condition for running a loop that your index is either greater than or less than some number, not purely equal.

Since we're just supposed to count down to 1, would it be: for (i=100; i> 0; i–)? Or does >= need to be included?

You can use "for (i=100; i>=1; i–)" or "for (i=100; i>0; i–)". They both say the same thing because the last time the "for loop" runs (when i=0), you do not want to include it. Both 0>0 and 0>=1 will return false, so the value i=0 will not print the last time and your loop will end.

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Sp2004 Final Exam Review last edited on 26 April 2004 at 3:49 pm by guzdial2.cc.gatech.edu