2D - Sprite based on angle

Is there a way to get the Z rotation of the transform and set the corresponding sprite for my character? So when a target is moving down, then player can see it's face, when the target is moving up, player can see it's back etc...like in starcraft.

So far i was trying to get eulerAngles of my target's transform, and then compare Z with a float...which doesnt work apparently=/ it does not show any errors whatsoever, as if the numbers just never matched.

 #pragma strict
 
 var spriteLeft : Sprite;
 var spriteRight : Sprite;
 var spriteUp : Sprite;
 var spriteDown : Sprite;
 
 
 function Start () {
 }
 
 function Update () {
     var angle = transform.eulerAngles;
     if(angle.z <= 0.0) { /*gameObject.GetComponent.<SpriteRenderer>().sprite = spriteLeft;*/ Debug.Log("one"); }
     if(angle.z >= 0.0) { /*gameObject.GetComponent.<SpriteRenderer>().sprite = spriteRight;*/ Debug.Log("two"); }
     
     //if(gameObject.transform.eulerAngles.z >= 90f) { gameObject.GetComponent.<SpriteRenderer>().sprite = spriteLeft; }
     //if(gameObject.transform.eulerAngles.z >= 0f) { gameObject.GetComponent.<SpriteRenderer>().sprite = spriteUp; }
     Debug.Log(transform.eulerAngles.z + "Angle: " + angle.z);
 }