43 lines
783 B
Markdown
43 lines
783 B
Markdown
---
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title: math.yn() function
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description: The math.yn() function returns the order-n Bessel function of the second kind.
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menu:
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v2_0_ref:
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name: math.yn
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parent: Math
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weight: 301
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---
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The `math.yn()` function returns the order-n Bessel function of the second kind.
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_**Output data type:** Float_
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```js
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import "math"
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math.yn(n: 3, x: 3.14)
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// Returns -0.4866506930335083
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```
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## Parameters
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### n
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The order number used in the operation.
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_**Data type:** Integer_
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### x
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The value used in the operation.
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_**Data type:** Float_
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## Special cases
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```js
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math.yn(n:n, x: +Inf) // Returns 0
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math.yn(n: ≥0, x: 0) // Returns -Inf
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math.yn(n: <0, x: 0) // Returns +Inf if n is odd, -Inf if n is even
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math.yn(n:n, x: <0) // Returns NaN
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math.yn(n:n, x:NaN) // Returns NaN
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```
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