---
title: MPSGraphLossReductionType.sum
framework: metalperformanceshadersgraph
role: symbol
role_heading: Case
path: metalperformanceshadersgraph/mpsgraphlossreductiontype/sum
---

# MPSGraphLossReductionType.sum

Reduces the loss down to a scalar with a sum operation.

## Declaration

```swift
case sum
```