Click to move towards an opponents transform and attack when in range

EDIT: So the problem is that all of my code is contained in IF statements, so when I click the mousebutton down it calls the movetopos function, which moves my player towards the transform. However I have no way of checking within that function when I have reached the range and then attacking. I have tried all types of while/do-while loops but cannot get it done.

All I want is Click left mouse button down -> Retrieve enemies transform -> move towards transform -> when transform is reached to automatically attack.

I've gone over and condensed my code to show only necessary functions.

Thanks

 void Update () {
         InRange();
 
         if (!die)
         {
             //Player clicks left mouse button to move only
             if (Input.GetMouseButton(0))
             {
                 //get position of where player clicked
                 GetPosition();
             }
 
             #region TEST UPDATE 1
             //Player clicks the right mouse button, if enemyhit, player will move to enemy to attack, if not hit, enemy move to pos hit.
             if (Input.GetMouseButtonDown(1))   //This button doubles as movement and attack
             {
                 GetPosition();
                 if (!inRange && enemyHit)
                 {
                     
                     if (inRange)
                     {
                         Attack();
                     }
                 }
                 else if (inRange && enemyHit)
                 {
                     _position = transform.position;
                     
                     Attack();
                 }
             }
            // MoveToPos();
             #endregion
 
         }
         //MoveToPos();
 
         Impact();
 
      
         if (!inRange)
         {
             MoveToPos();
         }
 
         if(inRange)
         {
             Attack();
         }
     }
 
  void GetPosition()
     {
         RaycastHit hit;
 
         Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
 
         if (Physics.Raycast(ray, out hit, 1000f))
         {
             if (hit.collider.tag != "Player" && hit.collider.tag != "Enemy")
             {                
                 _position = new Vector3(hit.point.x, 0, hit.point.z);
                 enemyHit = false;
             }
 
             if (hit.collider.tag == "Enemy")
             {
                 enemyHit = true;
                 opponent = opponent.gameObject;
                 if(!inRange)
                 _position = opponent.transform.position;
 
             }
             //Instantiate animatation to represent click pos on the terrain
             //GameObject position = (GameObject)Instantiate(posClick, _position, Quaternion.identity);
         }
     }
 
    void MoveToPos()
     {
         //GameObject is moving
         if (Vector3.Distance(transform.position, _position) >= RADIUS)
         {
             GetMousePos();
 
             Quaternion newRotation = Quaternion.LookRotation(_position - transform.position, Vector3.forward);
 
             newRotation.x = 0f;
             newRotation.z = 0f;
 
             transform.rotation = Quaternion.Slerp(transform.rotation, newRotation, Time.deltaTime * 10);
 
             //transform.position = Vector3.MoveTowards(transform.position, opponent.transform.position, step);
 
            
             cc.SimpleMove(transform.forward * speed);
 
             GetComponent<Animation>().CrossFade(run.name);
 
             
             //GetComponent<Animation>().CrossFade(run.name);
         }
 
         //This was to check if play was within radius of attack, if they were it was meant to stop the player at their current position.
         //else if (Vector3.Distance(transform.position, _position) <= RADIUS)
         //{
         //    Attack();
         //}
 
         //Game object finished moving
         else
         {
             GetComponent<Animation>().CrossFade(idle.name);
         }
     }
 
   public void Attack()
     {
         //if (Input.GetMouseButton(1))
         //{
         //    if (!started)
         //    {
         //        GetComponent<Animation>().Play(attackClip.name);
         //        attack = false;
         //        transform.LookAt(lookTarget);
         //    }
         //}
 
         if (!started && enemyHit)
         {
             transform.LookAt(lookTarget);
             GetComponent<Animation>().Play(attackClip.name);
             attack = false;
         }
     }