JavaScript for in Array statement | Example code

JavaScript for in is used to loops through the properties of an object. This means a block of code inside the loop will be executed once for each property.

Syntax

The syntax of the for…in the loop is:

for (variable in object)   
//statement

Example of JavaScript for…in array

HTML example code of for…in the loop through the properties of an object:

<!DOCTYPE html>
<html>
<head>

    <script> 
        const object = { a: 1, b: 2, c: 3 };

        for (const property in object) {
          console.log(`${property}: ${object[property]}`);
      }
  </script> 

</head>
<body>

</body>
</html>

Output:

JavaScript for in Array statement

Do comment if you have another example or doubts or suggestions on this topic.

Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.

OS: Windows 10

Code: HTML 5 Version


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