# Branch On Input Connection node
The Branch On Input Connection node allows you to change the behavior of a [Sub Graph](Sub-graphs.md) based on the connected state of an input property in the parent shader graph. Use the Branch On Input Connection node to create a default input for a port.
For more information, refer to [Set default inputs for a Sub Graph](Sub-Graph-Default-Property-Values.md).
The node generates branching HLSL source code, but during compilation Unity optimizes the branch out of your shader.
## Compatibility
The Branch On Input Connection [!include[nodes-compatibility-all](./snippets/nodes-compatibility-all.md)] <!-- ALL PIPELINES INCLUDE -->
You can only use a Branch on Input Connection node in a [Sub Graph](Sub-graphs.md).
## Inputs
The Branch On Input Connection [!include[nodes-inputs](./snippets/nodes-inputs.md)] <!-- MULTIPLE INPUT PORTS INCLUDE -->
| **Name** | **Type** | **Description** |
| :--- | :------ | :---------- |
| **Input** | Property | The property that determines the branching logic in the node, based on its connection state in the parent Shader Graph. |
| **Connected** | Dynamic Vector | The value to send to the **Out** port when **Input** is connected in the parent Shader Graph. |
| **NotConnected** | Dynamic Vector | The value to send to the **Out** port when **Input** isn't connected in the parent Shader Graph. |
## Outputs
The Branch On Input Connection [!include[nodes-single-output](./snippets/nodes-single-output.md)] <!-- SINGLE OUTPUT PORT INCLUDE -->
| **Name** | **Type** | **Description** |
| :------ | :------- | :------------- |
| **Out** | Dynamic Vector | Outputs the value of either **Connected** or **NotConnected**, based on the **Input** property's connection state in the parent Shader Graph. |
## Related nodes
<!-- OPTIONAL. Any nodes that may be related to this node in some way that's worth mentioning -->
[!include[nodes-related](./snippets/nodes-related.md)] Branch On Input Connection node:
- [Branch node](Branch-Node.md)
- [Subgraph node](Sub-graph-Node.md)