What is the difference between char and string in Matlab?

Both char and string in MATLAB can be used to represent character arrays, but they have some differences.

1. char is a fixed-length character array that can contain multiple characters, but the length is constant. On the other hand, string is a variable-length character array that can contain any number of characters and can dynamically increase or decrease the number of characters.
2. In older versions of MATLAB before R2016b, char was the main character array type, but string type was introduced after R2016b. Therefore, in older versions of MATLAB, char was typically used to represent character arrays, while string is recommended in the newer versions.
3. The string type has convenient methods and operators that make it easier to manipulate and process character arrays, such as string concatenation and searching for substrings.

In general, the string type is more flexible and easier to manipulate, while the char type may be more suitable for situations requiring a fixed-length character array.