How to find data type of output in MySQL?

I was reading about the CONCAT() function, and I noticed this:

mysql> SELECT CONCAT(14.3);
        -> '14.3'

While running this command in MySQL 8.0 Command Line Client, the output didn't have quotes. So I wanted to verify the data type of the output (I assume it is a string data type). Please help me find the data type of the output.