# SetComponent

> Sets the value of a component of an entity.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Entities](/engine/7000.0/script-reference/unity/entities.md)
* **Assembly:** UnityEngine.EntitiesModule

## SetComponent\<T>(Entity, T)

Sets the value of a component of an entity.

```csharp
public static void SetComponent<T>(Entity entity, T component) where T : unmanaged, IComponentData
```

### Parameters

**** (\[Entity]\(/engine/7000.0/script-reference/unity/entities/entity)): The entity.**** (T): The data to set.

### Remarks

Use this method to look up and set data in another entity using its [Entity](/engine/7000.0/script-reference/unity/entities/entity.md) object. For example, if you have a component that contains an Entity field, you can update the component data for the referenced entity using this method.

When iterating over a set of entities with an idomatic foreach query, don't use this method to access the data of the current entity in the set. It's faster to access the data by requesting it as an argument of a query.

When you call this method gets replaced with component access methods through [ComponentLookup\<T>](/engine/7000.0/script-reference/unity/entities/componentlookup1.md).

In both cases, this lookup method results in a slower, indirect memory access. When possible, organize your data to minimize the need for indirect lookups.

Not working in IJobEntity, and Utility methods

## SetComponent\<T>(SystemHandle, T)

Sets the value of a component of an entity associated with a system.

```csharp
public static void SetComponent<T>(SystemHandle systemHandle, T component) where T : unmanaged, IComponentData
```

### Parameters

**** (\[SystemHandle]\(/engine/7000.0/script-reference/unity/entities/systemhandle)): The system handle.**** (T): The data to set.

### Remarks

Use this method to look up and set data in another system owned entity using its [SystemHandle](/engine/7000.0/script-reference/unity/entities/systemhandle.md) object.

When you call this method gets replaced with component access methods  through [ComponentLookup\<T>](/engine/7000.0/script-reference/unity/entities/componentlookup1.md).

Not working in IJobEntity, and Utility methods