Operator '&&' can't be applied to operands of type 'int' and 'bool' (minimum difference)

i am trying to find out the minimum difference between three integers. And it says:"Operator '&&' can't be applied to operands of type 'int' and 'bool'". Where i am wrong?

 static void Main(string[] args)
    {
        int number1, number2;
        Console.WriteLine("Enter three numbers.");
        int x= int.Parse(Console.ReadLine());
        int y= int.Parse(Console.ReadLine());
        int z= int.Parse(Console.ReadLine());

        if(Math.Abs(x-y) < Math.Abs(y-z) && Math.Abs(x-z))
        {
            number= x;
            number= y;
        }
        else if....