Ground Script explanation

Hi people , im loocking the scripts of the standart asset, and lock the block, how make the ground check, can someone explain this script to me? I know what he does, but I would like to understand all the components.

Collider2D[] colliders = Physics2D.OverlapCircleAll (groundCheck.position, groundradius, whatsIsGround);

	for (int i = 0; i < colliders.Length; i++) 
	{
		if(colliders*.gameObject != gameObject)*
  •   		grounded = true;*
    
  •   }*
    

I understand that you are declaring the variable colliders , but I do not understand Physics2D function, and the loop.

OverlapCircleAll() returns a collection of colliders found within a defined radius. You can see the details in the scripting docs here.

So, whatever colliders that method returns are stored in an array named “colliders”. Then, the “for” loop iterates through all of the colliders in that array. For each collider in the array, if the gameObject the collider is attached to is NOT the gameObject the above script is attached to (which is presumably the player), then it sets the grounded flag.

So, essentially… It finds all colliders within some defined radius of the player. Then, if one of the found colliders is NOT on the player itself, it assumes the ground has been found and sets the “grounded” boolean. That boolean is then likely used elsewhere to handle grounded logic.