Playing attack animations once?

Hello everyone! I'm trying to write a code in which if the player is within attacking distance, an attack animation will play once and go into either idle or walk animation. I was wondering what's the typical way of accomplishing this? Here's the part of code I wrote thus far

Code (csharp):

1.  
2.     // Handles whether the player is to move to a position or follow an enemy
3.     void Player_Follow_Or_Move()
4.     {
5.         // Runs through the list of enemies on screen
6.         foreach(GameObject Enemy in Enemies)
7.         {
8.             // Checks to see if the player clicked on the enemy
9.             if(Physics2D.OverlapPoint(Player_Direction.GetPoint(Player_Distance),1 << LayerMask.NameToLayer("Enemies")))
10.             {
11.                 // Sets the selected game object as the target and updates position with position checker
12.                 //Debug.Log("Enemy Selected"); 
13.                 Target = Enemy;
14.                 Position_Checker = Target.transform.position;
15.  
16.                 // Determines if the player is close enough for an attack
17.                 if(Vector2.Distance (Position_Checker, transform.position)<.6f)
18.                 {
19.                     Debug.Log("Attack Enemy!");
20.                     // Insert attacking code here
21.  
22.                 }
23.  
24.                 // Exits the main loop
25.                 return;
26.             }
27.            
28.         }
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