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typo fixed and minimal opinionated improvement

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koala-lava 2019-11-12 18:05:46 +07:00 • committed by GitHub
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1-js/05-data-types/02-number/article.md
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@ -122,7 +122,7 @@ There are several built-in functions for rounding:
: Rounds up: `3.1` becomes `4`, and `-1.1` becomes `-1`.
`Math.round`
: Rounds to the nearest integer: `3.1` becomes `3`, `3.6` becomes `4` and `-1.1` becomes `-1`.
: Rounds to the nearest integer: `3.1` becomes `3`, `3.5` becomes `4` and `-1.1` becomes `-1`.
`Math.trunc` (not supported by Internet Explorer)
: Removes anything after the decimal point without rounding: `3.1` becomes `3`, `-1.1` becomes `-1`.
@ -201,7 +201,7 @@ Strange! What is it then if not `0.3`?
alert( 0.1 + 0.2 ); // 0.30000000000000004
```
Ouch! There are more consequences than an incorrect comparison here. Imagine you're making an e-shopping site and the visitor puts `$0.10` and `$0.20` goods into their chart. The order total will be `$0.30000000000000004`. That would surprise anyone.
Ouch! There are more consequences than an incorrect comparison here. Imagine you're making an e-shopping site and the visitor puts `$0.10` and `$0.20` goods into their cart. The order total will be `$0.30000000000000004`. That would surprise anyone.
But why does this happen?