hide Slider until needed and hide when boss is dead

hi! i'm fairly new to unity and was wondering how i could hide a the boss health slider until i need him and destroy it when hes gone.

 

Is the health bar in a Canvas, or attached to the boss? If it's attached to the boss, just make it a child element of the boss, and it will go away automatically when he does.

If it's in a Canvas, it's still easy.
- Create the health bar with the "active" box unchecked (it's in the upper-left corner of the inspector).
- In your code, when you want the health bar to appear, call SetActive(true) on its GameObject.
- When the boss dies (which I assume happens in code), call SetActive(false) on the health bar.

 

it worked, thank you very much