JavaScript Tutorials

length property (arrays)

To determine the length of an array, that is, to determine how many elements the array currently contains, look at the "length" property of the array.

Code:

<script type="text/javascript">
//<![CDATA[
var colors = new Array("red", "orange", "yellow", "green", "blue", "indigo", "violet");

document.write("colors.length : ", colors.length, "<br><br>");

for (i=0; i<colors.length; i++)
{
  document.write("colors[", i, "] : ", colors[i], "<br>");
}

poppedElement = colors.pop();

document.write("<br>poppedElement : ", poppedElement, "<br><br>");

document.write("colors.length : ", colors.length, "<br><br>");

for (i=0; i<colors.length; i++)
{
  document.write("colors[", i, "] : ", colors[i], "<br>");
}
//]]>
</script>

Output: