JavaScript For...In Statement.
The for...in statement loops through the elements of an array or through the properties of an object.
Syntax.
for (variable in object)
{
code to be executed
}
Note: The code in the body of the for...in loop is executed once for each element/property.
Note: The variable argument can be a named variable, an array element, or a property of an object.
Example.
Use the for...in statement to loop through an array:
Example.
<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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