Using User Input and a Menu to Calculate Shape Volumes in Python

In this tutorial, we will learn how to find the volume of different shapes in Python using user input and a menu to select the shape. We will cover the following shapes:

1. Cube

2. Sphere

3. Cylinder

4. Cone

Before we begin, let's first import the necessary libraries. We will be using the math library to perform some calculations, so make sure to import it as well.

import math

Next, we will create a menu for the user to select the shape they want to find the volume of. We will use a while loop and a switch statement to handle the different shape options.

while True:
    print("Please select a shape:")
    print("1. Cube")
    print("2. Sphere")
    print("3. Cylinder")
    print("4. Cone")
    print("5. Quit")

    choice = int(input())

    if choice == 5:
        break

    if choice == 1:
        # Calculate the volume of a cube
        pass
    elif choice == 2:
        # Calculate the volume of a sphere
        pass
    elif choice == 3:
        # Calculate the volume of a cylinder
        pass
    elif choice == 4:
        # Calculate the volume of a cone
        pass
    else:
        print("Invalid choice. Please try again.")

Now let's define the functions to calculate the volume of each shape.

Cube

To find the volume of a cube, we need to ask the user for the length of one side of the cube. We can then use the following formula to calculate the volume:

volume = side^3

Here is the code to implement this in Python:

def find_cube_volume():
    side = float(input("Enter the length of one side of the cube: "))
    volume = side**3
    print(f"The volume of the cube is {volume}.")

Sphere

To find the volume of a sphere, we need to ask the user for the radius of the sphere. We can then use the following formula to calculate the volume:

volume = (4/3) * pi * radius^3

Here is the code to implement this in Python:

def find_sphere_volume():
    radius = float(input("Enter the radius of the sphere: "))
    volume = (4/3) * math.pi * radius**3
    print(f"The volume of the sphere is {volume}.")

Cylinder

To find the volume of a cylinder, we need to ask the user for the radius of the base and the height of the cylinder. We can then use the following formula to calculate the volume:

volume = pi * radius^2 * height

Here is the code to implement this in Python:

def find_cylinder_volume():
    radius = float(input("Enter the radius of the base of the cylinder: "))
    height = float(input("Enter the height of the cylinder: "))
    volume = math.pi * radius**2 * height
    print(f"The volume of the cylinder is {volume}.")

Cone

To find the volume of a cone, we need to ask the user for the radius of the base and the height of the cone. We can then use the following formula to calculate the volume:

volume = (1/3) * pi * radius^2 * height

Here is the code to implement this in Python:

def find_cone_volume():
    radius = float(input("Enter the radius of the base of the cone: "))
    height = float(input("Enter the height of the cone: "))
    volume = (1/3) * math.pi * radius**2 * height
    print(f"The volume of the cone is {volume}.")

Here is the complete code that includes all the functions within the while loop:

import math

def find_cube_volume():
    side = float(input("Enter the length of one side of the cube: "))
    volume = side**3
    print(f"The volume of the cube is {volume}.")

def find_sphere_volume():
    radius = float(input("Enter the radius of the sphere: "))
    volume = (4/3) * math.pi * radius**3
    print(f"The volume of the sphere is {volume}.")

def find_cylinder_volume():
    radius = float(input("Enter the radius of the base of the cylinder: "))
    height = float(input("Enter the height of the cylinder: "))
    volume = math.pi * radius**2 * height
    print(f"The volume of the cylinder is {volume}.")

def find_cone_volume():
    radius = float(input("Enter the radius of the base of the cone: "))
    height = float(input("Enter the height of the cone: "))
    volume = (1/3) * math.pi * radius**2 * height
    print(f"The volume of the cone is {volume}.")

while True:
    print("Please select a shape:")
    print("1. Cube")
    print("2. Sphere")
    print("3. Cylinder")
    print("4. Cone")
    print("5. Quit")

    choice = int(input())

    if choice == 5:
        break

    if choice == 1:
        find_cube_volume()
    elif choice == 2:
        find_sphere_volume()
    elif choice == 3:
        find_cylinder_volume()
    elif choice == 4:
        find_cone_volume()
    else:
        print("Invalid choice. Please try again.")

This code will present the user with a menu to select a shape, and then ask for the necessary input to calculate the volume of the selected shape. The program will continue to loop until the user selects the option to quit.