30 lines
649 B
Markdown
30 lines
649 B
Markdown
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---
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title: Math Sqrt
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---
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## Math Sqrt
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The function `Math.sqrt()` returns the square root of a number.
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If a negative number is entered, `NaN` is returned.
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`sqrt()` is a static method of `Math`, therefore it is always called as `Math.sqrt()` rather than as a method on another object.
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#### Syntax
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`Math.sqrt(x)`, where `x` is a number.
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#### Examples
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```js
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Math.sqrt(25); // 5
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Math.sqrt(169); // 13
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Math.sqrt(3); // 1.732050807568
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Math.sqrt(1); // 1
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Math.sqrt(-5); // NaN
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```
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#### More Information:
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<a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sqrt" target="_blank" rel="nofollow">MDN</a>
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