22 lines
534 B
Markdown
22 lines
534 B
Markdown
---
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title: Approximately number equality
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tags: math
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expertise: beginner
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firstSeen: 2018-02-14T12:47:13+02:00
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lastUpdated: 2020-11-01T20:50:57+02:00
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---
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Checks if two numbers are approximately equal to each other.
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- Use `Math.abs()` to compare the absolute difference of the two values to `epsilon`.
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- Omit the third argument, `epsilon`, to use a default value of `0.001`.
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```js
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const approximatelyEqual = (v1, v2, epsilon = 0.001) =>
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Math.abs(v1 - v2) < epsilon;
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```
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```js
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approximatelyEqual(Math.PI / 2.0, 1.5708); // true
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```
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