BCE0144: 'UnityEngine.GameObject.renderer' is obsolete. Property renderer has been deprecated. Use GetComponent() instead. (UnityUpgradable)

Well i am getting this error my here is my code

I downloaded the script from a tutorial video.
When i replace renderer on the 9th line
It gives me another error that says i cant use symbols like those

You’re getting the error because UnityEngine.GameObject.renderer is obsolete like the error message says. To get a reference to the renderer you need to use GetComponent.

var renderer = GetComonent<Renderer>();

Then you can use the renderer reference to do what you need.