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The for...in statement is used to loop
(iterate) through the elements of an array or through the
properties of an object.
JavaScript For...In Statement
The for...in statement is used to loop (iterate) through the
elements of an array or through the properties of an object.
The code in the body of the for ... in loop is executed once
for each element/property.
Syntax
for (variable in object)
{
code to be executed
}
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The variable argument can be a named variable, an array
element, or a property of an object.
Example
Using for...in to loop through an array:
<html>
<body>
<script type="text/javascript">
var x
var mycars = new Array()
mycars[0] = "Saab"
mycars[1] = "Volvo"
mycars[2] = "BMW"
for (x in mycars)
{
document.write(mycars[x] + "<br />")
}
</script>
</body>
</html>
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