# module `concrete.fhe.extensions.relu` Declaration of `relu` extension. --- ## function `relu` ```python relu(x: Union[Tracer, Any]) → Union[Tracer, Any] ``` Rectified linear unit extension. Computes: x if x >= 0 else 0 **Args:** x (Union[Tracer, Any]): input to apply ReLU **Returns:** Union[Tracer, Any]: Tracer that represent the operation during tracing result of ReLU on `x` otherwise