In this script I want to have my enemy character preform a different attack when it is within a certain range.
It's a spin attack and I have it set to be +2 distance away from a normal attack range.
I want the probability of the spin attack to be random, like a 10% probability of occurring.
Anyway that I set this up it is constantly checking if it is within range of the spin attack, resulting in a 100% probability rate.
So I've tried to set up a boolean variable in hopes of having it check only once if it is within range.
I realize the 'return' at the end of that is doing nothing.
Does anyone know of a better way to achieve this?

Yes, you could use a random number check. Basically, you would create a random number between 0 and 1 and when it is within a certain range, you can then check if the enemy is within range of the spin attack.
For example, something like this:

var random_number = random_range(0, 1);
if (random_number >= 0.9 && current_enemy_distance <= spin_attack_range + 2) {
// Perform the spin attack
}

    Don't forget to randomise the number before hand and look up random number generation is the only thing I'd add.

      GodetteAI
      Now if the spin attack occurs it will continue playing that animation until I step out of range. Is there a way to have it only do the spin attack once?

        Lethn
        Here is the new code with the AI assistance.

        var random_number = random_range(0, 1)
func _in_attack_circle():
     return random_number >= 0.5 && global_position.distance_to(player.global_position) <= ATTACK_RANGE +2

        In my process function I have this.
        anim_tree.set("parameters/conditions/spin_a", _in_attack_circle())

        When my character is in range and the probability is greater than 0.5 it will play the animation
        but it will continue playing the animation.