Quaternion.eulerAngles

Description

Returns the euler angle representation of the rotation.

A rotation that rotates euler.z degrees around the z axis, euler.x degrees around the x axis, and euler.y degrees around the y axis (in that order).

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public Quaternion rotation = Quaternion.identity;
    void Example() {
        rotation.eulerAngles = new Vector3(0, 30, 0);
        print(rotation.eulerAngles.y);
    }
}