# MLCActivationType An activation type that you specify for an activation descriptor. ``` enum MLCActivationType ``` ## Topics ### Enumeration Cases [`MLCActivationType.absolute`](/documentation/MLCompute/MLCActivationType/absolute) An activation type that implements the absolute activation function. [`MLCActivationType.celu`](/documentation/MLCompute/MLCActivationType/celu) An activation type that implements the CELU activation function. [`MLCActivationType.clamp`](/documentation/MLCompute/MLCActivationType/clamp) An activation type that implements the clamp activation function. [`MLCActivationType.elu`](/documentation/MLCompute/MLCActivationType/elu) An activation type that implements the exponential linear unit activation function. [`MLCActivationType.gelu`](/documentation/MLCompute/MLCActivationType/gelu) An activation type that implements the gaussian error linear unit activation function. [`MLCActivationType.hardShrink`](/documentation/MLCompute/MLCActivationType/hardShrink) An activation type that implements the hard shrink activation function. [`MLCActivationType.hardSigmoid`](/documentation/MLCompute/MLCActivationType/hardSigmoid) An activation type that implements the hard sigmoid activation function. [`MLCActivationType.hardSwish`](/documentation/MLCompute/MLCActivationType/hardSwish) An activation type that implements the hard swish activation function. [`MLCActivationType.linear`](/documentation/MLCompute/MLCActivationType/linear) An activation type that implements the linear activation function. [`MLCActivationType.logSigmoid`](/documentation/MLCompute/MLCActivationType/logSigmoid) An activation type that implements the log sigmoid activation function. [`MLCActivationType.none`](/documentation/MLCompute/MLCActivationType/none) An activation type that implements the identity function. [`MLCActivationType.relu`](/documentation/MLCompute/MLCActivationType/relu) An activation type that implements the rectified linear unit activation function. [`MLCActivationType.relun`](/documentation/MLCompute/MLCActivationType/relun) An activation type that implements the ReLUN activation function. [`MLCActivationType.selu`](/documentation/MLCompute/MLCActivationType/selu) An activation type that implements the scaled exponential linear unit activation function. [`MLCActivationType.sigmoid`](/documentation/MLCompute/MLCActivationType/sigmoid) An activation type that implements the sigmoid activation function. [`MLCActivationType.softPlus`](/documentation/MLCompute/MLCActivationType/softPlus) An activation type that implements the soft plus activation function. [`MLCActivationType.softShrink`](/documentation/MLCompute/MLCActivationType/softShrink) An activation type that implements the soft shrink activation function. [`MLCActivationType.softSign`](/documentation/MLCompute/MLCActivationType/softSign) An activation type that implements the parametric soft sign activation function. [`MLCActivationType.tanh`](/documentation/MLCompute/MLCActivationType/tanh) An activation type that implements the hyperbolic tangent activation function. [`MLCActivationType.tanhShrink`](/documentation/MLCompute/MLCActivationType/tanhShrink) An activation type that implements the hyperbolic tangent shrink activation function. [`MLCActivationType.threshold`](/documentation/MLCompute/MLCActivationType/threshold) An activation type that implements the threshold activation function. [`MLCActivationTypeCount`](/documentation/MLCompute/MLCActivationType/MLCActivationTypeCount) The count of activation types. [`debugDescription`](/documentation/MLCompute/MLCActivationType/debugDescription) A textual description of the activation type, suitable for debugging. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)