How do I define my return value in a while table?

[CBernard]

IMPORTANT: This is a homework assignment, so I am not looking for someone to write my code, just looking for guidance on structure.

My JavaScript table generates exactly as I want, but my code is missing the return value and is therefore giving me an undefined comment in addition to the table. I have tried nesting it all within another function, which I assign to the return value, but no change.

function Trig()    {    
 
    var d, x, decSin, decCos;
    d = 0;  // radians
 
    while (d <= 360) 
    {
        x = Math.PI/180*(d);
 
        decSin = Math.sin(x);
        decCos = Math.cos(x); //
 
        document.write("<tr><td>" + d + "</td><td>" + decSin + "</td><td>" + decCos + "</td></tr>");
 
        d = d+15;
    }    
}

[CBernard]

Got it

I added before the function closing bracket:

d='';
return d;