Question

This question relates to Javascript.

I know that a function can return 1 value or no values.

What are some examples of Javascript functions returning no values? Why is this useful? If the function does not return any value then why and how is it useful?

Answer 1

In Javascript there may be cases where function is not returning values. Actually this happens when we want that only the function will execute or from the main block we will redirect to the function block, and from the function the program will end. In other words we can say the function is acting like a procedure. In javascript we sometimes face this type of situation, like

<script>
function myCube(n)
{
c= n*n*n;
document.write(c);
}
myCube(3);
</script>

------Output is

27

Here we just call the function , and from the function the output is executed, this makes the program execution faster and also the program is simpler.