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layout: stdlib-reference
---

# interface IDifferentiableFunc\<TR, each TP\>

*Inherits from:* [IFunc](../ifunc-01/index.html)\<[TR](../ifunc-01/index.html#typeparam-TR), [TP](../ifunc-01/index.html#typeparam-TP)\>, [IDifferentiableMutatingFunc](../idifferentiablemutatingfunc-01fn/index.html)\<[TR](../idifferentiablemutatingfunc-01fn/index.html#typeparam-TR), [TP](../idifferentiablemutatingfunc-01fn/index.html#typeparam-TP)\>

## Description

Represents an interface for a function that can take multiple differentiable parameters and supports differentiation.
This interface inherits from both <span class='code'><a href="../ifunc-01/index.html" class="code_type">IFunc</a></span> and <span class='code'><a href="../idifferentiablemutatingfunc-01fn/index.html" class="code_type">IDifferentiableMutatingFunc</a></span> but is used for non-mutating differentiable functions.


## Generic Parameters

####  <a id="typeparam-TR"></a>TR: [IDifferentiable](../idifferentiable-01/index.html)
####  <a id="typeparam-TP"></a>TP: [IDifferentiable](../idifferentiable-01/index.html)

## Methods

* [operator\(\)](operatorx28x29)


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operator() <operatorx28x29>
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