Alert code and Function code in javascript

1

Is neccessary to add ALERT code in javascript after using FUNCTION code to know that code is working or not?If we do not want to type the alert code and if I want to know that my code is working or not means for example I typed:-

function pi(){
return 3.14;
}
function area_circle®{
area=pi()rr*4/3
return area
}
So for this code where can I see my answer(output) without using ALERT code in javascript?

2

@desaijugal14
return area, this command will… Execute the area will be printed on screen… And u’ll get to know that our code… Is working

3

Thanks for replying.

4

It is not necessary to se “alert” at the end of javascript functions . “Alert” is an inbuilt javascript function used to display some message as an alert in a box . If you want to know whether your code is working or not …Use typeof operator to know about the function existence before calling , Use return statements to return the function value.