Javascript increments of 0.005

Asked Sep 16 '15 at 19:59

Active Sep 16 '15 at 21:14

Viewed 42 times

I am implementing a business rule that says "a number must be in increments of 0.005 to be valid"

These are good:

123.005
123.0

These are bad:

123.004
123.1001

I've tried the modulus operator, but get unexpected numbers:

var x = 5.005;
var z = x % .005;

The result is 0.004999999999999789

Note: This question is NOT about rounding, it is about finding values that are increments of 0.05

Here's the solution:

//Multiply by 200 to get  a full int value (.005 * 200 ==  1)
if ((limitPrice * 200) % 1 !== 0) { 
     isFailure = true;
      errorMsg = "Blah blah";
}

edited Sep 16 '15 at 21:14

asked Sep 16 '15 at 19:59

Ian Vink

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Would rounding `123.004` then adding `0.005` help? – Adam Azad Sep 16 '15 at 20:01
1

I would work with integers and then move the decimal point when displaying it – Ruan Mendes Sep 16 '15 at 20:02
2

You can try this - `var x = 5.005;` `var z = (x * 1000) % 5;` – Viktor Bahtev Sep 16 '15 at 20:11
Victor - Your answer was correct. – Ian Vink Sep 16 '15 at 21:15

Javascript increments of 0.005

0 Answers0