Edgar - 1 year ago 90

Javascript Question

Why does

`49.90 % 0.10`

`0.09999999999999581`

Answer Source

Because JavaScript uses floating point math which always leads to rounding errors.

If you need an exact result with two decimal places, multiply your numbers with `100`

before the operation and then divide again afterwards:

```
var result = ( 4990 % 10 ) / 100;
```

Round if necessary.