Question

I understand that JS math is not perfect. but how can i format this to get the correct answer as I have a cart item which costs .60 cents and they can change the quantity?

var a=3*.6;
document.write(a);

writes 1.7999999999999998

Obviously I want to write 1.8. any ideas how to accomplish this?

Answer 1

Use toFixed to round it back:

var a = 3*.6;
document.write(a.toFixed(2));

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If you need it as a number, add a + sign before it:

var a = 3*.6;
console.log(+a.toFixed(2)); // Logs: 1.8, instead of "1.80"