How to use For...in Statement in JavaScript

In this article I am going to explain about for...in Statement in JavaScript.
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JavaScript For...in Statement

The for...in statement repeats a group of embedded statements for each element in an array. The for...in statement is used to iterate through the collection to get the information that you want, but can not be used to add or remove items from the source collection to avoid unpredictable side effects.

Syntax

for(variable in object)

      {

      //Statement that you want to execute

      }

Example

<html>

<head>

<script type="text/javascript">

    {

        function myFunction() {

            var x;

            var str = "";

            var Emp = { Name: "Raju", Add: "Delhi", age: 30 };

 

            for (x in Emp) {

            str = str +Emp[x];

        }

            document.write(str);

        }

    }

</script>

</head>

<body>

<button onclick="myFunction()">Click</button>

</body>

 

</html>

 

Output


forin.jpg

Further Readings

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