unity change material with code code example

Example 1: unity set material

gameObject.GetComponent<Renderer>().material = newMaterial;

Example 2: how to change material in script unity

public Material Material1;
  //in the editor this is what you would set as the object you wan't to change
  public Renderer Object;
 
  void Start()
  {
       Object.material = Material1;
  }