---
name: "BIS_fnc_lerp"
type: function
status: ok
groups: ["Interpolation"]
arma3_since: "1.00"
locality: {"argument": null, "effect": null, "server_exec": false}
source: https://community.bistudio.com/wiki/BIS_fnc_lerp
revid: 378113
updated: 2026-02-17T13:29:28Z
---

# BIS_fnc_lerp

*Function · Interpolation · Arma 3 v1.00*

## Description

Linear floating point interpolation (see [Linear Interpolation](https://en.wikipedia.org/wiki/Linear_interpolation)).

## Syntax

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

**Parameters:**

- `currentValue`: [Number](../topics/Number.md) - first point (start)
- `targetValue`: [Number](../topics/Number.md) - second point (end)
- `alpha`: [Number](../topics/Number.md) - interpolation speed

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

## Examples

### Example 1

```sqf
[1, 10, 0.5] call BIS_fnc_lerp; // returns 5.5
```

<sub>Source: [BI Community Wiki — BIS fnc lerp](https://community.bistudio.com/wiki/BIS_fnc_lerp) (revision 378113).</sub>