QWhat is the result of the following JavaScript code?
<p id="demo"></p>
<script>
function myFunction()
{
var num = 3+2;
var n = num.valueOf()
document.getElementById("demo").innerHTML = n;
}
</script>
Question Info
Choose the Best Option
Click any option to instantly check if you're correct.
Explanation
The code snippet you provided is a simple JavaScript function called "myFunction". This function performs the following actions:
-
The first line inside the function declares a variable called "num" and assigns it the value of the result of the mathematical expression 3 + 2, which is 5.
-
The next line declares a variable called "n" and assigns it the value of the primitive value of the "num" variable by calling the valueOf() method.
-
The final line uses the JavaScript DOM method getElementById() to select the HTML element with the id "demo" and then sets the innerHTML property of that element to the value of the "n" variable.
-
The function does not call itself and it need to call it to execute the code, for example myFunction()
In this case, when the function is called it will select the HTML element with the id "demo" and set its innerHTML to the value of the variable "n", which is 5. So, the output will be 5 in the element with id "demo" on the web page.
Share This Question
Challenge a friend or share with your study group.