Float number display text doesn't bugs out when it hits 0.008 or 9

Unity Engine
1

So the script consist of a really simple tapping game so you know “tap += tapsperclick” (ex) and i have them set to floats. But when i go add them in the game as i tap everything works until it gets to .8, i just jumps to 0.9999999999 instead of following its preset of 0.0001 addidtion that i made. This is what it looks like as i add them and get close to that number. Remember i just want to add 0.0001 to 0.0000

3361637--263300--upload_2018-1-20_15-36-34.png

3361637--263300--upload_2018-1-20_15-36-34.png

2

You should probably use ints to count clicks. Is there any problem with them?

3

I wanted to add zero point of something, int work fine but i would rather use floats because im trying to ad by point :confused:

4

Floats are imprecise. You can internally store clicks as ints, increment them by 1 and to get desired decimal numbers display them like this

var clicks = 99;
var decimalPlaces = 3;
var tempPrecisionNumber = (int)Math.Pow(10, decimalPlaces);
Debug.Log(String.Format("{0}.{1:smile:" + decimalPlaces + "}", clicks / tempPrecisionNumber, clicks % tempPrecisionNumber));
// Displays 0.099
1 Like
5

Floats are by nature inexact, in order to make them as performant as possible. They’re estimations. If you need to do arithmetic with them, you need to expect a certain level of imprecision in the result. They’re not used for financial calculations for good reason.

Related: never do == equality checking between floats unless you know you set their values explicitly, rather than as the result of a calculation.