how to make an array of characters of variable length?

I want to make an array of unique characters or strings of variable length (n) e.g n=5. so I can't use 'a':'e' cause 'e' is not constant it depends on n which varies continuously ...I don't know the 'e' ....I just know that i want an array e.g from 'a' to a+n

Any help is highly appreciated. Thanks

Answer 1

[Walter Roberson]

n=5;
'a':char('a'+n-1)

ans = 'abcde'