# MATLAB: Representing and empty cell

struct

I have a problem in setting this right.
I have this struct,
wordstruct =
    a: {'amal'  'asyik'  'ampun'}    b: {'bola'  'busuk'  'basi'}    c: {'cacing'  'campur'  'cucuk'}    .    .    .    z: {''..........''}
i want to compare an input of a string with a word in one of the fields in the struct so i tried this,I want to display that if the word does not exist, it'll say the word is invalid.
I know that if I have this line of code and the word does exist, it'll show me something like this,
word='bola'
(strfind(wordstruct.(word(1)),word);
ans =
    [1]    []    []
and if word='bell' %does not exist in struct
ans =
    []    []    []
however im having difficulty to represent the empty cell in my if statement where i have it like this:
if (strfind(wordstruct.(word(1)),word)= %%%%IDK this part
fprintf('this word is invalid');
else
fprintf('%s is in the wordbank',word);
end

wordstruct.a = {'amal'  'asyik'  'ampun'};wordstruct.b = {'bola'  'busuk'  'basi'};wordstruct.c = {'cacing'  'campur'  'cucuk'};word = 'bola';if any( strcmp( word, wordstruct.('b') ) )   disp( 'found the word' ) else  disp( 'failed' )  end