# unicorn/prefer-modern-math-apis

> Require `Math.log10()`, `Math.log2()`, `Math.hypot()` and `Math.abs()` over hand-written formulas

Formulas built from `Math.log()` and `Math.sqrt()` are longer than the method that does the same thing, and less exact. `Math.log(1000) / Math.LN10` is `2.9999999999999996`, but `Math.log10(1000)` is `3`. `Math.sqrt(x * x + y * y)` is `Infinity` as soon as a square overflows, while `Math.hypot(x, y)` still gives you the answer.

{/* Generated by src/codegen/lint-rule-docs.ts. Do not edit this section. */}

## Configure

Off by default. To turn it on:

```toml bunfig.toml
[lint.rules]
"unicorn/prefer-modern-math-apis" = "error" # or "warn"
```

{/* End of the generated section. */}

## Examples

Reported:

{/* bad {"count": 4} */}
```js
const digits = Math.log(value) * Math.LOG10E;
const bits = Math.log(value) / Math.LN2;
const distance = Math.sqrt(dx * dx + dy ** 2);
const size = Math.sqrt(delta * delta);
```

Not reported:

{/* good */}
```js
const digits = Math.log10(value);
const bits = Math.log2(value);
const distance = Math.hypot(dx, dy);
const size = Math.abs(delta);
```