JavaScript Function Call

<!DOCTYPE html>
<html>
<body>

<h2>The JavaScript <b>this</b> Keyword</h2>

<script>
// Create an object:
const student = {
  firstName: "Mohamed",
  lastName: "Ahmed",
  id: 99852,
  fullName : function() {
    return this.firstName + " " + this.lastName;
  }
};

// Display data from the object:
document.write(student.fullName());
</script>

</body>
</html>