| 11. 4. 1. Array.length |
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The length property holds the number of elements in the array. |
This property is a read/write variable. |
The size of an array can change dynamically at any time. |
The length of the array can also be changed by altering the length attribute. |
If the length property is overwritten with a number that is larger than the original number, new elements are added to the end of the array and assigned undefined values. |
If the length property is overwritten with a number that is smaller than the original number, elements at the end of the array are lost. |
If the length of an array is originally 10 and is reduced to 5, the elements in position 6 through 10 are lost. |
The following example uses the length Property to Reduce the Number of Elements in an Array. |
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<html>
<script language="JavaScript">
<!--
coins = new Array("A","B","C","D");
x = coins.length;
coins.length = 3
document.write("The coins array contains: ", coins.join(','));
-->
</script>
</html>
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