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- function t = isletter(c)
- %ISLETTER True for letters of the alphabet.
- % For a string S, ISLETTER(S) is 1 for letters of the alphabet
- % and 0 otherwise.
-
- % Copyright (c) 1984-93 by The MathWorks, Inc.
-
- t = (('a' <= c) & (c <= 'z')) | (('A' <= c) & (c <= 'Z'));
-