Shifted alphabet code calculator (Caeser code)

A simple coding method is to simply move the alphabet by a number of places back or forward, such as to move it back by three places:

abcdefghijklmnopqrstuvwxyz
DEFGHIJKLMNOPQRSTUVWXYZABC

Thus:

cat

would become:

FDW

The following should be able to determine the code for a given phrase and a number of shifts:

Enter number of shifts:

Mapping:

Enter a phrase

The code is:

To test, a one shift for cat should give "DBU", and a two shift gives "ECV", and a three shift gives "FDW", and so on.

Next try foxtrot for three places, and it should give: "IRAWURW" and scooby for three places should give: "VFRREB".