print("Welcome to Surface Area and Volume calculator.")
print("MAKE SURE TO ENTER THE VALUES WITH SAME UNIT")
        
sav = input("""What do you want to calculate?
            Please answer as "Surface Area" or "Volume":-  """)
sav1 = sav.lower()

#value of pi
pi = 22/7

if sav1 == "surface area":
    print("""You can calculate the surface area of the following shapes:
        -->Square
        -->Rectangle
        -->Triangle
        -->Circle
        -->Parallelogram
        -->Cube
        -->Cuboid 
        -->Cone
        -->Cylinder
        -->Sphere
        -->Hemisphere""")
    shape = input("Which shape?: ")
    shape1 = shape.lower()
    
    if shape1 == "square":
        side = float(input("Please enter the side length: "))
        ans = side**2
        print("Your answer is:", ans)
        
    elif shape1 == "rectangle":
        length = float(input("Please enter the figure length: "))
        breadth = float(input("Please enter the figure breadth: "))
        ans = length*breadth
        print("Your answer is:", ans)
        
    elif shape1 == "triangle":
        a = float(input("Please enter the length of side A: "))
        b = float(input("Please enter the length of side B: "))
        c = float(input("Please enter the length of side C: "))
        s = (a+b+c)/2
        ans = (s*(s-a)*(s-b)*(s-c))**0.5
        print("Your answer is:", ans)
        
    elif shape1 == "circle":
        radius = float(input("Please enter the figure radius: "))
        ans = pi*(radius**2)
        print("Your answer is:", ans)

    elif shape1 == "parallelogram":
        base = float(input("Please enter the base value: "))
        height = float(input("Please enter the figure height: "))
        ans = base*height
        print("Your answer is:", ans)
        
    elif shape1 == "cube":
        side = float(input("Please enter the side length: "))
        ans = 6*(side**2)
        print("Your answer is:", ans)
        
    elif shape1 == "cuboid":
        length = float(input("Please enter the figure length: "))
        breadth = float(input("Please enter the figure breadth: "))
        height = float(input("Please enter the figure height: "))
        ans = 2*((length*breadth)*(length*height)*(breadth*height))
        print("Your answer is:", ans)
    
    elif shape1 == "cone":
        radius = float(input("Please enter the base radius: "))
        slant_height = float(input("Please enter the slant height: ")) 
        ans = pi*radius*slant_height
        print("Your answer is:", ans)
        
    elif shape1 == "cylinder":
        radius = float(input("Please enter the base radius: "))
        height = float(input("Please enter the figure height: ")) 
        ans = 2*pi*radius*height
        print("Your answer is:", ans)
        
    elif shape1 == "sphere":
        radius = float(input("Please enter the base radius: "))
        ans = 4*pi*(radius**2)
        print("Your answer is:", ans)
        
    elif shape1 == "hemisphere":
        radius = float(input("Please enter the base radius: "))
        ans = 3*pi*(radius**2)
        print("Your answer is:", ans)
        
    else:
        print("Invalid Input.")
        
elif sav1 == "volume":
    print("""You can calculate the volumes of following shapes:
            -->Cube
            -->Cuboid 
            -->Cone
            -->Cylinder
            -->Sphere
            -->Hemisphere""")
    shape = input("Which shape?: ")
    shape1 = shape.lower()
    
    if shape1 == "cube":
        side = float(input("Please enter the side length: "))
        ans = side**3
        print("Your answer is:", ans)
        
    elif shape1 == "cuboid":
        length = float(input("Please enter the figure length: "))
        breadth = float(input("Please enter the figure breadth: "))
        height = float(input("Please enter the figure height: "))
        ans = length*breadth*height
        print("Your answer is:", ans)
        
    elif shape1 == "cone":
        radius = float(input("Please enter the base radius: "))
        height = float(input("Please enter the figure height: ")) 
        ans = (1/3)*pi*(radius**2)*height
        print("Your answer is:", ans)
        
    elif shape1 == "cylinder":
        radius = float(input("Please enter the base radius: "))
        height = float(input("Please enter the figure height: ")) 
        ans = pi*(radius**2)*height
        print("Your answer is:", ans)
        
    elif shape1 == "sphere":
        radius = float(input("Please enter the base radius: "))
        ans = (4/3)*pi*(radius**3)
        print("Your answer is:", ans)
        
    elif shape1 == "hemisphere":
        radius = float(input("Please enter the base radius: "))
        ans = (2/3)*pi*(radius**3)
        print("Your answer is:", ans)
        
    else:
        print("Invalid Input.")
        
else:
        print("Invalid Input.")