Check out example codes for "playerprefs and bools". It will help you in understanding the concepts better.

Code Example 1

public static void SetBool(string name, bool booleanValue) 
	{
		PlayerPrefs.SetInt(name, booleanValue ? 1 : 0);
	}
 
	public static bool GetBool(string name)  
	{
	    return PlayerPrefs.GetInt(name) == 1 ? true : false;
	}
 
	public static bool GetBool(string name, bool defaultValue)
	{
	    if(PlayerPrefs.HasKey(name)) 
		{
	        return GetBool(name);
	    }
 
	    return defaultValue;
	}

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