Convert temperatures in Python

This program show you how to convert temperatures in Python. It uses a menu system to allow you to select an option. Or, you can also end the program. In addition, you get to see the match..case statement in action.

Code listing to convert temperatures in Python

Below is the code listing for this program.

# ---------------------------------------------------------------------
# convert_temps.py
# Designed and programmed by Alex Shaw III
# Date created:  January 5, 2023
# Last modified: January 5, 2023
#
# This program allows you to convert Celsius, Fahrenheit, and Kelvin
# temperatures from a menu
# ---------------------------------------------------------------------
 
# ----------------- 
# Define menu items 
# -----------------
menuItems = ['A.  Celsius to Fahrenheit', 'B.  Fahrenheit to Celsius', 
             'C.  Celsius to Kelvin', 'D.  Exit program']
 
# ---------------- 
# Define functions 
# ----------------
def mainMenu():
    print('\nMain menu\n' + '-'*40)
 
    for menuItem in menuItems:
        print(menuItem)
 
    print('-'*40, '\n')
 
# ------------ 
# Main program 
# ------------ 
end = False
while (end == False):
    mainMenu()
 
    choice = input('Please make a selection: ')
 
    match choice.upper():
        case 'A':
            print('\n****** Convert Celsius to Fahrenheit ******\n')
            celTemp = input('Enter a Celsius temperature: ')
             
            fahTemp = (float(celTemp) * (9 / 5)) + 32
             
            print(str(celTemp) + ' degrees Celsius is ' + 
                  str(fahTemp) + ' degrees Fahrenheit.\n')
        case 'B':
            print('\n****** Convert Fahrenheit to Celsius ******\n')
            fahTemp = input('Enter a Fahrenheit temperature: ')
             
            celTemp = (float(fahTemp) - 32) * (5 / 9)
             
            print(str(fahTemp) + ' degrees Fahrenheit is ' + 
                  str(celTemp) + ' degrees Celsius.\n')
        case 'C':
            print('\n****** Convert Celsius to Kelvin ******\n')
            celTemp = input('Enter a Celsius temperature: ')
             
            kelTemp = float(celTemp) + 273.15
             
            print(str(celTemp) + ' degrees Celsius is ' + 
                  str(kelTemp) + ' Kelvin.\n')
        case 'D':
            print('\n****** End of program ******')
            print('Thank you for using this program.\n')
            end = True
        case _:
            print('\n****** Invalid selection ******')
            print('Please try again.\n')