Thread: Problem with Looping...

I am trying to create a program that generates a string output from a string inputted by a user. The program must convert the string inputted by the user to string that is generated depending on the Key(any integer) which will be used as a basis of the to generate the secret code.

For example: if the user inputs "java" and the Key is "3" the output must be "mdyz". The problem is that i created an array of the 26 letters of the alphabet and if the Key is greater than 26 i always get an ArrayIndexOutOfBoundsException.

char [] alphabet = {'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};

How can i loop through that array and return to the first index after it reaches the last index of the array?

I would write out a bunch of examples until you see a pattern. What if the user enters 'z' and 5? What about 'y' and 3? Keep writing examples until a pattern emerges, then use that pattern to come up with your code.