If Statement Help

I am trying to get this in to a if statement.

 void Shoot() {
     float angle = pm.isFacingRight ? 0f : 180f;
     Instantiate(bulletPrefab, firingPoint.position, Quaternion.Euler(new Vector3(0f, 0f, angle)));
 }   

Something like....

 void Shoot() {
     float angle = pm.isFacingRight ? 0f : 180f;


     if (something to open if statement)
        {
     Instantiate(bulletPrefab, firingPoint.position, Quaternion.Euler(new Vector3(0f, 0f, angle)));
         }   else if (second part) 
        {
     Instantiate(bulletPrefab, firingPoint.position, Quaternion.Euler(new Vector3(-180f, -180f, angle)));
        }   

What I am looking for is "-|-" and I am currently getting "_|-"