Infinite ray length

Hello. Im trying to make an infinite ray lengh but I have no idea how to do it. I know how to make a limited length ray and I do it like this

 var rayLength : float = 100;
  
 var hit : RaycastHit;     
 var forward = transform.TransformDirection(Vector3.forward);
      
      if(Physics.Raycast(transform.position,
  forward, hit, rayLengh)) 

 {
        code();
     }

How do I make it infinite ? Thank you. I hope I was clear enough.

The code im using :

 function Shoot()
 {
     var hit : RaycastHit;
     var forward = transform.TransformDirection(Vector3.forward);
     
     if(Physics.Raycast(transform.position, forward, hit, Mathf.Infinity))
     {
         var Gun : Transform;
         Gun = Instantiate(bullet, barrelEnd.position, transform.rotation);
         Gun.LookAt(hit.point);
         w();
         wep.animation.Play("Shoot");
         audio.PlayOneShot(shootSoundEffect);
     }
 }