---
name: "BIS_fnc_inverseLerp"
type: function
status: ok
groups: ["Interpolation"]
arma3_since: "1.78"
locality: {"argument": null, "effect": null, "server_exec": false}
source: https://community.bistudio.com/wiki/BIS_fnc_inverseLerp
revid: 349097
updated: 2023-11-08T14:49:33Z
---

# BIS_fnc_inverseLerp

*Function · Interpolation · Arma 3 v1.78*

## Description

Inverse of [BIS_fnc_lerp](../functions/BIS_fnc_lerp.md).

## Syntax

```sqf
[currentValue, targetValue, alpha] call BIS_fnc_inverseLerp
```

**Parameters:**

- `currentValue`: [Number](../topics/Number.md) - start
- `targetValue`: [Number](../topics/Number.md) - end
- `alpha`: [Number](../topics/Number.md) - alpha

**Returns:** [Number](../topics/Number.md) - interpolated value

## Examples

### Example 1

```sqf
[10,20,0.5] call BIS_fnc_inverseLerp;
```

## See also

[BIS_fnc_clerp](../functions/BIS_fnc_clerp.md) · [BIS_fnc_slerp](../functions/BIS_fnc_slerp.md) · [BIS_fnc_lerp](../functions/BIS_fnc_lerp.md) · [BIS_fnc_lerpVector](../functions/BIS_fnc_lerpVector.md)

<sub>Source: [BI Community Wiki — BIS fnc inverseLerp](https://community.bistudio.com/wiki/BIS_fnc_inverseLerp) (revision 349097).</sub>