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Looking for help with rotating sprites

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I am trying to rotate my car sprite just slightly to the left or right depending on input up to a small maximum. When I use this code, the rotation doesn't stop at the maximum i give it. When i try to reset the rotation back to its original state when not pressing any input, the car also jitters between a z axis rotation of 0 and 2.5. I don't understand why the rotation doesn't stop at the given maximums, nor do I understand why its jittering. Can anybody provide me some insight? float movementHorizontal = 0f; float movementVertical = 0f; if (Input.GetKey(KeyCode.A) && Input.GetKey(KeyCode.D)) { } else if (Input.GetKey(KeyCode.A)) { movementHorizontal = -1; if (transform.rotation.z < 10f) { transform.Rotate(zAxis, 2.5f); } } else if (Input.GetKey(KeyCode.D)) { movementHorizontal = 1; if (transform.rotation.z > -10f) { transform.Rotate(zAxis, -2.5f); } } else { if(transform.rotation.z > 0) { transform.Rotate(zAxis, -2.5f); //transform.rotation.Set(0, 0, 0, 0); } else if (transform.rotation.z < 0) { transform.Rotate(zAxis, 2.5f); //transform.rotation.Set(0, 0, 0, 0); } }

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