Question

I remember this having a specific name, and there were example codes on various websites – but I can’t remember what it was actually called so can’t find anything…

Basically, I want to generate all the possible letter combinations in a loop. The output would be something like this:

A
B
C
...
Z
AA
AB
AC
---
AZ
BA
BB
BC

etc…

Answer 1

Try this (pseudocode):

function loop(prefix, max_length):
   for c in 'A' to 'Z':
      print prefix + c

   for c in 'A' to 'Z':
      if length(prefix) < max_length:
         loop( prefix + c, max_length)

 loop('', 2 )