42 lines
807 B
Markdown
42 lines
807 B
Markdown
---
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title: math.erfcinv() function
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description: The math.erfcinv() function returns the inverse of `math.erfc()`.
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aliases:
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- /v2.0/reference/flux/functions/math/erfcinv/
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menu:
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v2_0_ref:
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name: math.erfcinv
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parent: Math
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weight: 301
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---
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The `math.erfcinv()` function returns the inverse of `math.erfc()`.
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_**Output data type:** Float_
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```js
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import "math"
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math.erfcinv(x: 0.42345)
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// Returns 0.5660037715858239
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```
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## Parameters
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### x
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The value used in the operation.
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`x` should be greater than 0 and less than 2.
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Otherwise, the operation will return `NaN`.
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_**Data type:** Float_
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## Special cases
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```js
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math.erfcinv(x: 0) // Returns +Inf
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math.erfcinv(x: 2) // Returns -Inf
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math.erfcinv(x: <0) // Returns NaN
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math.erfcinv(x: >2) // Returns NaN
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math.erfcinv(x: NaN) // Returns NaN
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```
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