how to set material in unity code example

Example 1: c# change material in code

currentObject.GetComponent<Renderer>().material = materialToAssign;

Example 2: how to set material c unity

Renderer rend = GetComponent<Renderer>();
 if (rend != null){
     rend.material = newMaterialRef;
 }

Example 3: unity set material

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