Stopping a JavaScript function when a certain condition is met

Question

I can\'t find a recommended way to stop a function part way when a given condition is met. Should I use something like exit or break?

I am

Answer 1

The return statement exits a function from anywhere within the function:

function something(x)
{
    if (x >= 10)
        // this leaves the function if x is at least 10.
        return;

    // this message displays only if x is less than 10.
    alert ("x is less than 10!");
}