2.0 Encryption Overview

# VARIABLES
dictionary = "abcdefghijklmnopqrstuvwxyz"
encrypting = input("Would you like to encrypt or decrypt? ( e / d ) ")
key = int(input("Enter your key: "))
message = input("Enter your message: ")
newMessage = ""

# FOR LOOP
for character in message:
    position = dictionary.find(character)
    if encrypting == "e":
        newPosition = (position + key)
    elif encrypting == "d":
        newPosition = (position - key)
    newMessage += dictionary[newPosition]

# PRINT
print()
print(newMessage)

Try to run the above code. What does it do?