Create a string with the same characters, using double quotes. Though it stores 11 characters, str is
a 1-by-1 string array, or string scalar. If you call length on a string scalar, then the output argument is
1, no matter how many characters it stores.
str = "Hello World";
L = length(str)
L = 1
To determine the number of characters in a string, use the strlength function, introduced in
R2016b. For compatibility, strlength operates on character vectors as well. In both cases
strlength returns the number of characters.
L = strlength(C)
L = 11
L = strlength(str)
L = 11
You also can use strlength on string arrays containing multiple strings and on cell arrays of
character vectors.
The length function returns the size of the longest dimension of an array. For a string array, length
returns the number of strings along the longest dimension of the array. It does not return the number
of characters within strings.
Why Does isempty("") Return 0?
A string can have no characters at all. Such a string is an empty string. You can specify an empty
string using an empty pair of double quotes.
L = strlength("")
L = 0
However, an empty string is not an empty array. An empty string is a string scalar that happens to
have no characters.
sz = size("")
sz = 1×2
1
1
If you call isempty on an empty string, then it returns 0 (false) because the string is not an empty
array.
tf = isempty("")
tf = logical
0
However, if you call isempty on an empty character array, then it returns 1 (true). A character
array specified as a empty pair of single quotes, '', is a 0-by-0 character array.
tf = isempty('')
Frequently Asked Questions About String Arrays
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