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#(a) Create a class Square that has:
class Square:

    #Attributes:
    #sides – a class variable to store the number of sides
    sides = 4


    #Methods:
    # __init__ – initialize the __side_length attributes
    def __init__(self, length):
        self.__side_length = length #an instance var to store the length of side

    # side – return the length of side (getter)
    def side(self):
        return self.__side_length
    
    # area – return the area of the square instance
    def area(self):
        return self.__side_length ** 2
    
    # perimeter – return the perimeter of the square instance
    def perimeter(self):
        return self.__side_length * self.sides
    
    # diagonal – return the diagonal of the square instance
    def diagonal(self):
        return (self.__side_length ** 2 * 2) **  0.5 # or math.sqrt(xxxx) 


#(b)	Complete the following client program:
if __name__ == "__main__":

    #(i)	Create a square instance square1 with a side of 5.
    Square1 = Square(5)
    
    #(ii)	Create another square instance square2 with a side of 10.   
    
    
    #(iii)	Use the methods created in part (a) to print the details of the squares following the sample output below