Script / Calculation to round decimals?

Question

Hello all,
I'm building a form to look at the cost of replacing lightbulbs over time, based upon the average life of the lightbulb and average annual operating hours. Normally, I can find this by dividing bulb life over bulb use and multiplying that by the replacement cost, which works fine for our use if you're replacing lightbulbs at least once a year. However, we have lightbulbs that can burn continuously for 5 years, and since you can't by 20% of a lightbulb, I really cant get away with averaging the cost because it's not a true expenditure of money.
So what I'm looking for is a script or calculation that will round "X" (the field in question) to the lowest whole number. When X = 1 that would mean the lightbulb has burned its life hours and would need to be replaced. In that case I can multiply that rounded result by the price and I should be ok.
Basically;
if "X" is greater than 0 or 1, it would round it to 0, even is X is actually .95.
ANY help I can get on this would be very much appreciated! Thanks

Answer 1

You can use the Math.floor method. For example:
var x = 0.95;
var y = Math.floor(x);
app.alert(y);  // Shows 0
If you need more help with creating a custom format/calculate/validate script that does this, post again an include more details about how you want the form to behave.