String indexing and concatenation

You are presented with one of the earliest known encryption techniques - Caesar cipher. It is based on a simple shift of each letter in a message by a certain number of positions down the given alphabet. For example, given the English alphabet, a shift of 1 for 'xyz' would imply 'yza' and vice versa in case of decryption. Notice that 'z' becomes 'a' in this case.

Thus, encryption/decryption requires two arguments: text and an integer key denoting the shift (key = 1 for the example above).

Your task is to create an encryption function given the English alphabet stored in the alphabet string.

Fill in the blanks in the loop to create an encrypted text.
Check the encryption function with the shift equals to 10 (it should return 'nkdkmkwz').

Exercise

String indexing and concatenation

Instructions 1/2