Strange error on float multiplication

fredciel

Hi apparently, float multiplication have some problem with some value... just try this:

void setup() {
  for (int i = 0; i < 100; i++) {
    println(i*.1);
  }
}

the result is

0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.90000004
1.0
1.1
1.2
1.3000001
1.4
1.5
1.6
1.7
1.8000001
1.9
2.0
2.1000001
2.2
2.3
2.4
2.5
2.6000001
2.7
2.8
2.9
3.0
3.1000001
3.2
3.3
3.4
3.5
3.6000001
3.7
3.8
3.9
4.0
4.1
4.2000003
4.3
4.4
4.5
4.6
4.7000003
4.8
4.9

this is amazing !!!!!!

GoToLoop

https://Processing.org/reference/float.html
https://forum.Pprocessing.org/two/discussions/tagged/float

fredciel

this is awful !!!!

koogs

this is amazing !!!!!!

you are easily amused.

how would you write 1/3 as a decimal? this is just the same thing but in binary.

GoToLoop

For printing, you can use nf() to get rid of those excess zeros:
https://processing.org/reference/nf_.html