how I can know if a string is empty or not!?
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please help me with a code ! thank you !
0 Comments
Accepted Answer
Guillaume
on 15 May 2016
Edited: Guillaume
on 15 May 2016
>>isempty('aaa')
ans =
0
>>isempty('')
ans =
1
Note that because strings are just matrices (of characters), it's the same test you use for matrix emptiness.
4 Comments
Adam Danz
on 7 May 2020
Edited: Adam Danz
on 7 May 2020
For strings or char arrays, you can use,
TF = strlength(s)==0; % r2016b or later
Demo
strlength('word') % ans = 4
strlength("word") % ans = 4
strlength("") % ans = 0
strlength('') % ans = 0
If the string is scalar,
isempty(char(s))
Demo
s = "";
isempty(char(s)) % ans = 1
Stephen23
on 8 May 2020
Edited: Stephen23
on 8 May 2020
"" is not an empty string array, it is a scalar string array (which happens to have zero characters, but the number of characters is totally irrelevant to the size of the string array):
>> isscalar("aaaaaaaaa")
ans=
1
>> isscalar("")
ans=
1
If you want to know how many characters are in the elements of a string array, use strlength:
More Answers (1)
Weird Rando
on 15 May 2016
Edited: Weird Rando
on 15 May 2016
You can use the length()
a = '';
stringlen = length(a) % stringlen = 0
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