Why does implicit conversion happen from 'char' to 'string' when concatenating?

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Concatenating char arrays results in a new char array, as expected:
>> ['a', 'b', 'c']
ans =
However, if any element of this array is a string, there is an implicit conversion of all the char arrays to strings, and the behavior is quite different:
>> ['a', "b", 'c']
ans =
1×3 string array
"a" "b" "c"
What is the reason for this?

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 1 Dec 2022
In concatenation operations, the dominant object determines the class of the resulting array, according to the following documentation:
Therefore, when the array contains both 'char' and 'string', the concatenation results in a 'string' array.
The following documentation includes other related examples to demonstrate this idea:

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