---
title: "addConstant(_:)"
framework: realitykit
role: symbol
role_heading: Instance Method
platforms: [iOS 27.0+, iPadOS 27.0+, tvOS 27.0+, visionOS 27.0+]
path: "realitykit/shadergraph/addconstant(_:)"
---

# addConstant(_:)

## Declaration

```swift
@discardableResult final func addConstant(_ value: ShaderGraph.Value) throws -> String
```