39 lines
705 B
Markdown
39 lines
705 B
Markdown
---
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title: math.erf() function
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description: The math.erf() function returns the error function of `x`.
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aliases:
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- /influxdb/v2.0/reference/flux/functions/math/erf/
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- /influxdb/v2.0/reference/flux/stdlib/math/erf/
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- /influxdb/cloud/reference/flux/stdlib/math/erf/
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menu:
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flux_0_x_ref:
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name: math.erf
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parent: math
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weight: 301
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introduced: 0.22.0
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---
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The `math.erf()` function returns the error function of `x`.
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_**Output data type:** Float_
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```js
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import "math"
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math.erf(x: 22.6)
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// Returns 1.0
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```
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## Parameters
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### x {data-type="float"}
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The value used in the operation.
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## Special cases
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```js
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math.erf(+Inf) // Returns 1
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math.erf(-Inf) // Returns -1
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math.erf(NaN) // Returns NaN
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```
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