Play an animation on button press

Unity Engine
1

I am trying to make an attack animation play when I press the fir button but it just plays all the time

Here is the script:
using UnityEngine;
using System.Collections;
public class Attack : MonoBehaviour {

** public bool strike;**
** void Update () {**

** if (Input.GetKeyDown (“C”)) {**
** strike = true;**
** }**
** if(strike==true){**
** animation.Play(“HammerStrike”);**
** }**
** }**
}

Any help would be appreciated

2

Change the wrap mode to make it play once, or if you want to not permanently change it, you can follow the example in the best answer here:
http://answers.unity3d.com/questions/45070/play-animation-only-once.html?sort=oldest