Particle System trigger script not working,Particle system trigger script not working

Hello everybody. I am trying to make my particle system trigger when there is a collision. It seems there is nothing wrong except that Visual Studio says "Identifier expected". I am a beginner with Unity, so can somebody please help? Below is my code.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 functionUnityEngine;
 
 
 function OnTriggerEnter(col="Collider")OnTriggerEnter(col="Collider")
 {
     if (gameObject.tag == "Player")"Player")
     {
         particle.Play();
     }
 }